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Teradyne Announces Third Quarter Results

BOSTON--Oct. 1, 20058, 2005--Teradyne, Inc. reported sales of $386.7 million in the third quarter, up 21% compared to the second quarter, and an 11% sequential increase in orders to $387.9 million. The company had a net loss in the third quarter of $35.4 million or $0.18 per share. This loss included $52.8 million or $0.27 per share in charges, consisting of an inventory provision of $38.5 million in Semiconductor Test related to non-FLEX products, and net restructuring and other charges of $14.3 million. The net restructuring and other charges reflect progress towards the company's previously communicated plan of lowering its breakeven level. Excluding these charges, the company had pro forma net income per share of $0.09 in the third quarter. In the previous quarter, the company had a net loss of $45.5 million or $0.23 per share, which included $10.2 million or $0.05 per share in net restructuring and other charges.

"While total orders were up 11%, our semiconductor test orders grew 40% over the second quarter," said Michael Bradley, Teradyne president and CEO. "That increase was driven by an expansion of our FLEX (TM) System-On-a-Chip (SOC) family of testers across a broad range of device applications. FLEX also set another bookings record in the quarter. In the fourth quarter, we're projecting strong growth in our continuing operations of semiconductor test, assembly test, and broadband test. Our recent decision to divest our Connection Systems business will enable us to focus on and grow our core test businesses and stay more tightly connected to our customers."

On October 10, 2005, Teradyne announced it had signed an agreement, which is expected to close in the fourth quarter, to sell its Connection Systems division for $390 million in cash (subject to a post-closing net asset value adjustment). Provided that occurs, Connection Systems' fourth quarter financial results will be reported as discontinued operations in accordance with generally accepted accounting principles ("GAAP"). Therefore, Connection Systems' revenue and expenses for the fourth quarter will not be included in the company's continuing operations.

The company's continuing operations guidance for the fourth quarter is for sales to be between $330 and $350 million, with net income per share from continuing operations of between $0.42 and $0.45. This includes $0.26 per share of income consisting of: a one-time tax benefit of $0.23 per share and a gain from the anticipated sale of a building of $0.05 per share; offset to a lesser extent by net restructuring and other charges of $0.02 per share. Excluding these items, the fourth quarter guidance for pro forma net income per share from continuing operations is expected to be between $0.16 and $0.21.

The tax benefit referred to above of $0.23 per share is a direct result of the anticipated gain on the sale of Connection Systems and a corresponding tax provision is included in discontinued operations in conformity with GAAP. Net income for the quarter, including results of continuing operations, discontinued operations, and gain on disposal of discontinued operations is expected to be between $0.96 and $1.01 per share.

To facilitate a better understanding of the fourth quarter guidance which excludes Connection Systems operations, there are four exhibits attached that disclose and reconcile GAAP to pro forma results for the three and nine months ended October 2, 2005 and give effect to the divestiture of Connection Systems as of the beginning of 2005.

Conference Call/Webcast

Teradyne will be conducting its conference call tomorrow, October 19, at 10:00 a.m. E.D.T. The call will be webcast at www.teradyne.com (click on "Investors"). A replay will be available via phone starting at noon E.D.T. and continuing through November 2. The replay may be accessed by calling 1-800-642-1687 in the US and Canada, or 706-645-9291 outside the US and Canada, and providing conference code 9838283, or by visiting www.teradyne.com and clicking on "Investors" for a link to the replay. Pro Forma Results and Guidance

In addition to disclosing results that are determined in accordance with GAAP, Teradyne also discloses pro forma or non-GAAP results of operations that exclude certain charges. These results are provided as a complement to results provided in accordance with GAAP. Teradyne reports pro forma results in order to better assess and reflect operating performance. In addition, Teradyne also discloses pro forma or non-GAAP results of operations that give effect to the divestiture of Connection Systems as of January 1, 2005. Management believes these pro forma measures helps indicate underlying trends in Teradyne's business and in the immediate instance, illustrate the anticipated financial effect of the sale of the Connection Systems business and help facilitate a better understanding of the fourth quarter guidance, which excludes Connection Systems operations. Management also uses pro forma measures to plan and forecast future periods, and to establish operational goals. Accordingly, fourth quarter earnings guidance is disclosed on both a GAAP and non-GAAP basis, which excludes certain charges and anticipates the closing of the Connection Systems divestiture in the fourth quarter. A reconciliation of GAAP to pro forma financial information discussed in this press release is contained in the attached exhibits and on the company's website at www.teradyne.com by clicking on "Investors" and then selecting the "GAAP to Pro Forma Reconciliation" link. About Teradyne

Teradyne is a leading supplier of Automatic Test Equipment and interconnection systems. The company's products deliver competitive advantage to the world's leading semiconductor, electronics, automotive and network systems companies. In 2004, Teradyne had sales of $1.8 billion, and currently employs about 5,500 people worldwide. For more information, visit . Teradyne(R) is a registered trademark of Teradyne, Inc. in the US and other countries. All product names are trademarks of Teradyne, Inc. (including its subsidiaries) or their respective owners. Safe Harbor Statement

The forward-looking statements included in this release are made only as of the date of publication and Teradyne undertakes no obligation to update the information set forth in this release.

TERADYNE, INC. REPORT FOR THIRD FISCAL QUARTER OF 2005

CONDENSED  CONSOLIDATED  OPERATING  STATEMENTS
 (In thousands, except per share amounts)

                                               Quarter Ended:
                                       ------------------------------
                                       October 2,  July 3,  October 3,
                                          2005       2005      2004
                                       ---------- --------- ----------
Net Revenues                           $386,692   $320,172  $457,800
     Cost of Revenues (1)               283,051    222,007   269,344
                                       ---------  --------- ---------
Gross Profit                            103,641     98,165   188,456

Operating Expenses:
     Engineering and Development         56,259     60,915    67,243
     Selling and Administrative          65,309     67,542    70,270
     Restructuring and Other Charges,
      net (2)                            14,337     10,195       (46)
                                       ---------  --------- ---------
           Operating Expenses           135,905    138,652   137,467

(Loss)/Income From Operations           (32,264)   (40,487)   50,989

     Interest Income                      3,972      3,841     3,784
     Interest Expense                    (4,059)    (4,153)   (4,696)
     Other Income and Expense, Net            -          -         -
                                       ---------  --------- ---------

(Loss)/Income Before Income Taxes       (32,351)   (40,799)   50,077
     Income Tax Expense                   3,027      4,665     8,928
                                       ---------  --------- ---------

Net (Loss)/Income                      $(35,378)  $(45,464)  $41,149
                                       =========  ========= =========

(Loss)/Income per Common Share -
 Basic and Diluted:
--------------------------------------

Net (Loss)/Income per Common Share -
 Basic                                   $(0.18)    $(0.23)    $0.21
                                       =========  ========= =========


Shares used in calculation of Net
 (Loss)/Income per Common Share -
 Basic                                  196,835    195,757   194,128
                                       =========  ========= =========

Net (Loss)/Income per Common Share -
 Diluted (3)                             $(0.18)    $(0.23)    $0.21
                                       =========  ========= =========

Shares used in calculation of Net
 (Loss)/Income per Common Share -
 Diluted                                196,835    195,757   195,751
                                       =========  ========= =========

Gross Orders                           $389,203   $353,328  $294,512
                                       =========  ========= =========
Net Orders                             $387,933   $348,952  $284,060
                                       =========  ========= =========


                                              Nine Months Ended:
                                         -----------------------------
                                             October        October
                                             2, 2005        3, 2004
                                         -------------- --------------

Net Revenues                             $  1,012,445   $   1,414,866

     Cost of Revenues (1)                     721,499         823,807
                                          ------------   -------------
Gross Profit                                  290,946         591,059

Operating Expenses:
     Engineering and Development              181,414         198,851
     Selling and Administrative               198,166         206,503
     Restructuring and Other Charges,
      net  (2)                                 35,160            (629)
                                          ------------   -------------
           Operating Expenses                 414,740         404,725

(Loss)/Income From Operations                (123,794)        186,334

     Interest Income                           12,218          10,845
     Interest Expense                         (12,646)        (14,223)
     Other Income and Expense, Net                  -           1,277
                                          ------------   -------------

(Loss)/Income Before Income Taxes            (124,222)        184,233
     Income Tax Expense                         9,192          22,344
                                          ------------   -------------

Net (Loss)/Income                        $   (133,414)  $     161,889
                                          ============   =============

(Loss)/Income per Common Share -
 Basic and Diluted:
----------------------------------------

Net (Loss)/Income per Common Share -
 Basic                                   $      (0.68)  $        0.83
                                          ============   =============

Shares used in calculation of Net
 (Loss)/Income per Common Share - Basic       196,070         193,998
                                          ============   =============

Net (Loss)/Income per Common Share -
 Diluted (3)                             $      (0.68)  $        0.81
                                          ============   =============

Shares used in calculation of Net
 (Loss)/Income per Common Share -
 Diluted                                      196,070         213,137
                                          ============   =============

Gross Orders                             $  1,084,517   $   1,403,913
                                          ============   =============
Net Orders                               $  1,077,555   $   1,393,244
                                          ============   =============


(1) Cost of revenues includes an inventory provision of $38.5 million
    in the quarter ended October 2, 2005 for non-FLEX products in the
    Semiconductor Test Division.

(2) Restructuring and Other Charges, net consists of:
                        
                                             Quarter Ended:
                                   October 2,   July 3,    October 3,
                                       2005        2005        2004
                                   ----------------------- -----------
    Severance                      $   12,479  $    4,624  $      66
    Facility Related                     (121)        896          -
    Long-Lived Asset Impairment             -       9,157        562
    Gain on Sale of Real Estate             -      (4,445)         -
    Gain on Sale of Business                -        (612)         -
    Divestiture-Related Fees            1,596       1,482          -
    Other                                 383        (907)      (674)
                                    ----------  ----------  ---------
                                   $   14,337  $   10,195  $     (46)
                                    ==========  ==========  =========

                                               Nine Months Ended:
                                            October 2,   October 3,
                                                2005         2004
                                           ------------- ------------
    Severance                              $    24,186   $      (694)
    Facility Related                             3,311          2,136
    Long-Lived Asset Impairment                  9,752           (41)
    Gain on Sale of Real Estate                 (4,445)            -
    Gain on Sale of Business                      (612)         (865)
    Divestiture-Related Fees                     3,078             -
    Other                                         (110)       (1,165)
                                            -----------   -----------
                                           $    35,160   $      (629)
                                            ===========   ===========

(3) Under GAAP, when calculating diluted earnings per share,
    convertible debentures must be assumed to have converted if the
    effect on EPS would be dilutive. For Teradyne, dilution occurs
    when earnings are greater than $0.24 per share per quarter.
    Accordingly, for the quarter ended October 3, 2004, diluted shares
    do not assume the conversion of the convertible debentures as the
    effect would be anti-dilutive. Diluted shares for the nine months
    ended October 3, 2004 assumes the conversion of the convertible
    debentures, as the effect of the conversion on EPS would be
    dilutive. Accordingly, 15.2 million shares have been included in
    diluted shares and net interest expense of $11.1 million has been
    added back to net income for the diluted earnings per share
    calculation.



CONDENSED  CONSOLIDATED  BALANCE  SHEETS  (In thousands)

                                            October 2,   December 31,
                                                2005          2004
                                           ---------------------------

Assets
    Cash and Cash Equivalents              $    225,392  $   209,147
    Marketable Securities                        91,291       75,431
    Accounts Receivable                         269,283      223,491
    Inventories                                 222,190      262,996
    Other Current Assets                         32,675       34,761
                                            ------------  -----------
                                                840,831      805,826

    Net Property, Plant and Equipment           513,949      547,075
    Long-term Marketable Securities             249,150      406,615
    Goodwill                                    116,176      116,176
    Intangible and Other Assets                  40,450       46,870
                                            ------------  -----------
                                           $  1,760,556  $ 1,922,562
                                            ============  ===========

Liabilities
    Notes Payable - Banks                  $      2,657  $     4,826
    Current Portion of Long-term Debt               294          321
    Accounts Payable                             89,746       62,006
    Accrued Employees' Compensation and
     Withholdings                                78,416      106,298
    Deferred Revenue and Customer Advances       29,032       30,399
    Other Accrued Liabilities                    57,247       60,970
    Income Taxes Payable                          7,891       11,738
                                            ------------  -----------
                                                265,283      276,558

    Pension Liability                            41,755       69,187
    Other Long-term Liabilities                  45,527       44,321
    Convertible Senior Notes                    371,500      391,500
    Other Long-term Debt                          7,012        7,432
                                            ------------  -----------
                                                731,077      788,998

Shareholders' Equity                          1,029,479    1,133,564
                                            ------------  -----------

                                           $  1,760,556  $ 1,922,562
                                            ============  ===========

For press releases and other information of interest to investors,
please visit Teradyne's homepage on the World Wide Web at
http://www.teradyne.com.




GAAP to Pro Forma Earnings Guidance Reconciliation

Earnings guidance for the fourth quarter of 2005 is being provided on
a GAAP and pro forma basis. Pro forma information is not determined
using GAAP and should not be considered superior to or as a substitute
for GAAP measures or data prepared in accordance with GAAP.


                        "Low" Forecast for     "High" Forecast for
                         Three Months Ended      Three Months Ended
                      ----------------------- -----------------------
                         December 31, 2005       December 31, 2005
                                         Unaudited
                            (in millions, except per share data)
                                   Pro                     Pro
                       GAAP   %    Forma  %    GAAP   %    Forma  %
                      ----------- ----------- ----------- -----------
Net Revenues          $330.0 100% $330.0 100% $350.0 100% $350.0 100%

       Cost of
        Revenues       181.0  55   181.0  55   190.0  54   190.0  54
                      ----------- ----------- ----------- -----------

Gross Profit           149.0  45   149.0  45   160.0  46   160.0  46

Operating Expenses:
       Engineering and
        Development     52.0  16    52.0  16    53.0  15    53.0  15
       Selling and
        Administrative  61.0  18    61.0  18    61.0  17    61.0  17
       Restructuring
        and Other
        Charges, net    (6.0) (2)      -   -    (6.0) (2)      -   -
                      ----------- ----------- ----------- -----------
         Operating
          Expenses     107.0  32   113.0  34   108.0  31   114.0  33

Income from Continuing
 Operations             42.0  13    36.0  11    52.0  15    46.0  13

       Net Interest
        Income           1.0   0     1.0   0     1.0   0     1.0   0
                      ----------- ----------- ----------- -----------

Income from Continuing
 Operations Before
 Income Taxes           43.0  13    37.0  11    53.0  15    47.0  13
       Tax Benefit
        from gain on
        disposal of
        TCS            (47.0)(14)      -   -   (44.0)(13)      -   -
       Income Tax
        Expense          5.0   1     5.0   1     5.0   1     5.0   1
                      ----------- ----------- ----------- -----------

Net Income from
 Continuing Operations $85.0  26 % $32.0  10 % $92.0  26 % $42.0  12 %
                      =========== =========== =========== ===========

Income per common
 share - basic and
 diluted:
----------------------

Net Income per Common
 Share - Basic         $0.43       $0.16       $0.47       $0.21
                      =======     =======     =======     =======

Shares used in
 calculation of Net
 Income per Common
 Share - Basic         196.8       196.8       196.8       196.8

Net Income per Common
 Share - Diluted (1)   $0.42       $0.16       $0.45       $0.21
                      =======     =======     =======     =======

Shares used in
 calculation of Net
 Income per Common
 Share - Diluted       212.4       198.1       212.4       198.1

Pro forma adjustments:
Restructuring and
 Other Charges, net
 (2)                                 $(6)                    $(6)
Tax benefit from gain
  on disposal of TCS
  (3)                                (47)                     (44)
                                  -------                 -------
Total pro forma
 adjustments                        $(53)                    $(50)
                                  =======                 =======


(1) Under GAAP, when calculating diluted earnings per share,
    convertible debentures must be assumed to have converted if the
    effect on EPS would be dilutive. For Teradyne, dilution occurs
    when earnings are greater than $0.24 per share per quarter.
    Accordingly, for GAAP net income from continuing operations for
    the quarter ended December 31, 2005, diluted shares assume the
    conversion of the convertible debentures as the effect would
    dilutive. Diluted shares for the for Pro Forma net income from
    continuing operations for the quarter ended December 31, 2005 does
    not assume the conversion of the convertible debentures, as the
    effect of the conversion on EPS would be anti-dilutive.
    Accordingly, 14.3 million shares have been included in diluted
    shares and net interest expense of $3.4 million has been added
    back to net income for the diluted earnings per share calculation.

(2) Restructuring and Other Charges, net consists of:


          Gain on Sale of Real
           Estate                 $(10)
          Severance                  4
                                -------
                                   $(6)
                                =======

(3) Under GAAP, there will be a tax benefit recorded in continuing
    operations for a portion of the net operating loss carryforwards
    used as a result of the sale of TCS. There will be an offsetting
    tax provision included in the gain on the sale of TCS included in
    discontinued operations.

GAAP to Pro Forma Statement of Operations Reconciliation

In addition to disclosing results that are determined in accordance
with Generally Accepted Accounting Principles (GAAP), Teradyne also
discloses pro forma or non-GAAP results of operations that exclude
certain charges. Teradyne reports pro forma results in order to better
assess and reflect operating performance. These results are provided
as a complement to results provided in accordance with GAAP.
Management believes the pro forma measure helps indicate underlying
trends in Teradyne's business, and management uses pro forma measures
to plan and forecast future periods and to establish operational
goals.

Pro forma information is not determined using GAAP and should not be
considered superior to or as a substitute for GAAP measures or data
prepared in accordance with GAAP.



                                               Three Months Ended
                                          ----------------------------
                                                   Unaudited
                                                 (in millions, 
                                            except per share data)

                                                October 2, 2005
                                                          Pro
                                           GAAP    %      Forma   %
                                          -------------  -------------
Net Revenues                              $386.7 100.0%  $386.7 100.0

 Cost of Revenues                          283.1  73.2    244.6  63.3
                                          -------------  -------------

Gross
 Profit                                    103.6  26.8    142.1  36.7

Operating Expenses:
 Engineering and Development                56.3  14.6     56.3  14.6
 Selling and Administrative                 65.3  16.9     65.3  16.9
 Restructuring and Other Charges            14.3   3.7        -     -
                                          -------------  -------------
         Operating Expenses                135.9  35.1    121.6  31.4

(Loss)/Income from Operations              (32.3) (8.4)    20.5   5.3

 Interest
  Income                                     4.0   1.0      4.0   1.0
 Interest Expense                           (4.1) (1.1)    (4.1) (1.1)
 Other Income and Expense, net                 -     -        -     -
                                          -------------  -------------

(Loss)/Income Before Income Taxes          (32.4) (8.4)    20.4   5.3
 Income Tax Expense                          3.0   0.8      3.0   0.8
                                          -------------  -------------

Net (Loss)/Income                         $(35.4) (9.2)%  $17.4   4.5%
                                          =============  =============

(Loss)/Income per common share - basic and
 diluted:
------------------------------------------

Net (Loss)/Income per Common Share - Basic$(0.18)         $0.09
                                          =======        =======

Shares used in calculation of Net
 (Loss)/Income per Common Share - Basic    196.8          196.8


Net (Loss)/Income per Common Share -
 Diluted (1)                              $(0.18)         $0.09
                                          =======        =======

Shares used in calculation of Net
 (Loss)/Income per Common Share - Diluted  196.8          198.1


Pro forma adjustments:
Cost of Revenues (2)                                      $38.5
Restructuring and Other Charges (3)                        14.3
                                                         -------
Total pro forma adjustments                               $52.8
                                                         =======


                                                  July 3, 2005
                                                          Pro
                                            GAAP    %     Forma   %
                                           ------------- -------------
Net Revenues                               $320.2 100.0% $320.2 100.0%

 Cost of Revenues                           222.0  69.3   222.0  69.3
                                           ------------- -------------

Gross
 Profit                                      98.2  30.7    98.2  30.7

Operating
 Expenses:
 Engineering and Development                 60.9  19.0    60.9  19.0
 Selling and Administrative                  67.5  21.1    67.5  21.1
 Restructuring and Other Charges             10.2   3.2       -     -
                                           ------------- -------------
         Operating Expenses                 138.6  43.3   128.4  40.1

(Loss)/Income from Operations               (40.4)(12.6)  (30.2) (9.4)

 Interest
  Income                                      3.8   1.2     3.8   1.2
 Interest Expense                            (4.2) (1.3)   (4.2) (1.3)
 Other Income and Expense, net                  -     -       -     -
                                           ------------- -------------

(Loss)/Income Before Income Taxes           (40.8)(12.7)  (30.6) (9.6)
 Income Tax Expense                           4.7   1.5     4.7   1.5
                                           ------------- -------------

Net
 (Loss)/Income                             (45.5)(14.2)%$(35.3)(11.0)%
                                           ============= =============

(Loss)/Income per common share - basic and
 diluted:
------------------------------------------

Net (Loss)/Income per Common Share - Basic $(0.23)       $(0.18)
                                           =======       =======

Shares used in calculation of Net
 (Loss)/Income per Common Share - Basic     195.8         195.8


Net (Loss)/Income per Common Share -
 Diluted (1)                               $(0.23)       $(0.18)
                                           =======       =======

Shares used in calculation of Net
 (Loss)/Income per Common Share - Diluted   195.8         195.8


Pro forma adjustments:
Cost of Revenues (2)                                         $-
Restructuring and Other Charges (3)                        10.2
                                                         -------
Total pro forma adjustments                               $10.2
                                                         =======


                                                 October 3, 2004
                                                          Pro
                                            GAAP    %     Forma   %
                                           ------------- -------------
Net Revenues                               $457.8 100.0% $457.8 100.0%

         Cost of Revenues                   269.3  58.8   269.3  58.8
                                           ------------- -------------

Gross Profit                                188.5  41.2   188.5  41.2

Operating Expenses:
         Engineering and Development         67.2  14.7    67.2  14.7
         Selling and Administrative          70.4  15.4    70.4  15.4
         Restructuring and Other Charges     (0.1) (0.0)      -     -
                                           ------------- -------------
                      Operating Expenses    137.5  30.0   137.6  30.1
                                  

(Loss)/Income from Operations                51.0  11.1    50.9  11.1

         Interest Income                      3.8   0.8     3.8   0.8
         Interest Expense                    (4.7) (1.0)   (4.7) (1.0)
         Other Income and Expense, net          -     -       -     -
                                           ------------- -------------

(Loss)/Income Before Income Taxes            50.1  10.9    50.0  10.9
         Income Tax Expense                   8.9   1.9     8.9   1.9
                                           ------------- -------------

Net (Loss)/Income                           $41.2   9.0%  $41.1   9.0%
                                           ============= =============

(Loss)/Income per common share - basic and
 diluted:
------------------------------------------

Net (Loss)/Income per Common Share - Basic  $0.21         $0.21
                                           =======       =======

Shares used in calculation of Net
 (Loss)/Income per Common Share - Basic     194.1         194.1


Net (Loss)/Income per Common Share -
 Diluted (1)                                $0.21         $0.21
                                           =======       =======

Shares used in calculation of Net
 (Loss)/Income per Common Share - Diluted   195.8         195.8


Pro forma adjustments:
Cost of Revenues (2)                                         $-
Restructuring and Other Charges (3)                        (0.1)
                                                         -------
Total pro forma adjustments                               $(0.1)
                                                         =======


                                              Nine Months Ended
                                       -------------------------------
                                                  Unaudited
                                       (in millions, except per share
                                                    data)

                                               October 2, 2005
                                         GAAP     %    Pro Forma  %
                                       --------------- ---------------
Net Revenues                           $1,012.4 100.0% $1,012.4 100.0%

          Cost of Revenues                721.5  71.3     683.0  67.5
                                       --------------- ---------------

Gross Profit                              290.9  28.7     329.4  32.5

Operating Expenses:
          Engineering and Development     181.4  17.9     181.4  17.9
          Selling and Administrative      198.1  19.6     198.1  19.6
          Restructuring and Other
           Charges                         35.2   3.5         -     -
                                       --------------- ---------------
               Operating Expenses         414.7  41.0     379.5  37.5

(Loss)/Income from Operations            (123.8)(12.2)    (50.1) (4.9)

          Interest Income                  12.2   1.2      12.2   1.2
          Interest Expense                (12.6) (1.2)    (12.6) (1.2)
          Other Income and Expense,
           net                                -     -         -     -
                                       --------------- ---------------

(Loss)/Income Before Income Taxes        (124.2)(12.3)    (50.5) (5.0)
          Income Tax Expense                9.2   0.9       9.2   0.9
                                       --------------- ---------------

Net (Loss)/Income                       $(133.4)(13.2)%  $(59.7)(5.9)%
                                       =============== ===============

(Loss)/Income per common share - basic
 and diluted:
--------------------------------------

Net (Loss)/Income per Common Share -
 Basic                                   $(0.68)         $(0.30)
                                       =========       =========

Shares used in calculation of Net
 (Loss)/Income per Common Share -
 Basic                                    196.1           196.1


Net (Loss)/Income per Common Share -
 Diluted (1)                             $(0.68)         $(0.30)
                                       =========       =========

Shares used in calculation of Net
 (Loss)/Income per Common Share -
 Diluted                                  196.1           196.1


Pro forma adjustments:
Cost of Revenues (2)                                      $38.5
Restructuring and Other Charges (3)                        35.2
                                                       ---------
Total pro forma adjustments                               $73.7
                                                       =========


                                              October 3, 2004
                                        GAAP     %   Pro Forma   %
                                      --------------- ---------------
Net
 Revenues                             $1,414.9 100.0% $1,414.9 100.0%

 Cost of Revenues                        823.8  58.2     823.8  58.2
                                      --------------- ---------------

Gross
 Profit                                  591.1  41.8     591.1  41.8

Operating
 Expenses:
 Engineering and Development             198.9  14.1     198.9  14.1
 Selling and Administrative              206.5  14.6     206.5  14.6
 Restructuring and Other Charges          (0.6) (0.0)        -     -
                                      --------------- ---------------
         Operating Expenses              404.8  28.6     405.4  28.7

(Loss)/Income from Operations            186.3  13.2     185.7  13.1

 Interest
  Income                                  10.8   0.8      10.8   0.8
 Interest Expense                        (14.2) (1.0)    (14.2) (1.0)
 Other Income and Expense, net             1.3   0.1       1.3   0.1
                                      --------------- ---------------

(Loss)/Income Before Income Taxes        184.2  13.0     183.6  13.0
 Income Tax Expense                       22.3   1.6      22.3   1.6
                                      --------------- ---------------

Net
 (Loss)/Income                          $161.9  11.4%   $161.3  11.4%
                                      =============== ===============

(Loss)/Income per common share -
 basic and diluted:
-------------------------------------

Net (Loss)/Income per Common Share -
 Basic                                   $0.83           $0.83
                                      =========       =========

Shares used in calculation of Net
 (Loss)/Income per Common Share -
 Basic                                   194.0           194.0


Net (Loss)/Income per Common Share -
 Diluted (1)                             $0.81           $0.81
                                      =============== =========

Shares used in calculation of Net
 (Loss)/Income per Common Share -
 Diluted                                 213.1           213.1


Pro forma
 adjustments:
Cost of
 Revenues (2)                                               $-
Restructuring and Other Charges (3)                       (0.6)
                                                       ---------
Total pro forma adjustments                              $(0.6)
                                                       =========

(1) Under GAAP, when calculating diluted earnings per share,
    convertible debentures must be assumed to have converted if the
    effect on EPS would be dilutive. For Teradyne, dilution occurs
    when earnings are greater than $0.24 per share per quarter.
    Accordingly, for the three months ended October 2, 2005, July 3,
    2005 and October 3, 2004, and for the nine months ended October 2,
    2005, diluted shares do not assume the conversion of the
    convertible debentures as the effect would be anti-dilutive.
    Diluted shares for the nine months ended October 3, 2004 assumes
    the conversion of the convertible debentures, as the effect of the
    conversion on EPS would be dilutive. Accordingly, 15.2 million
    shares have been included in diluted shares and net interest
    expense of $11.1 million has been added back to net income for the
    diluted earnings per share calculation.


(2) During the three and nine months ended October 2, 2005, Teradyne
    recorded an inventory provision of $38.5 million for non-FLEX
    products in the Semiconductor Test Division.

(3) Restructuring and Other Charges, net consists of:
                                                      

                                   For the three         For the nine
                                    months ended         months ended
                               ----------------------- ---------------
                               October  July   October October October
                                 2,      2,       3,     2,       3,
                                2005    2005    2004    2005    2004
                               ------- ------  ------- ------- -------
  Severance                    $12.5    $4.6    $0.1   $24.1   $(0.7)
  Facility Related              (0.1)    0.9       -     3.3     2.1
  Long-Lived Asset Impairment      -     9.2     0.5     9.8       -
  Gain on Sale of Real Estate      -    (4.4)      -    (4.4)      -
  Gain on Sale of Business         -    (0.6)      -    (0.6)   (0.8)
  Divestiture-Related Fees       1.6     1.5       -     3.1       -
  Other                          0.3    (0.9)   (0.7)   (0.1)    (1.2)
                               ------  ------  ------  ------  ------
                               $14.3   $10.3   $(0.1)  $35.2   $(0.6)
                               ======  ======  ======  ======  ======

GAAP to Pro Forma Reconciliation - Connection Systems Divestiture

The accompanying GAAP and pro forma statements of operations for the
quarter and nine months ended October 2, 2005 reflect the disposition
of Connection Systems ("TCS") as if it had occurred as of January 1,
2005. The pro forma adjustments are based on the operations of TCS
during the periods presented, the impact from the sale of the TCS
business and other transactions associated with the disposition. They
have been made to illustrate the anticipated financial effect of the
sale of the TCS business and are based on presently available
information. Consequently, the pro forma financial information
presented is not necessarily indicative of the results that would have
been reported had the transaction actually occurred as of January 1,
2005.

                             For the quarter ended October 2, 2005
                          --------------------------------------------
                             GAAP     TCS GAAP   Pro Forma  Pro Forma
                           Teradyne    Segment  Adjustments  Teradyne
                                       Results
                          ----------- --------- ----------- ----------
Net Revenues                $386,692   $93,119          $-   $293,573

      Cost of Revenues       244,586    74,893        (148)A  169,545
      Cost of Revenues -
       provision for
       non-FLEX
        Semiconductor
         Test products        38,465         -          -       38,465
                          ----------- --------- ----------- ----------

Gross Profit                 103,641    18,226         148     85,563

Operating Expenses:
      Engineering and                                      
       Development            56,259     2,490         (70)A   53,699
      Selling and                                          
       Administrative         65,309     9,339        (172)A
                                                     3,090 B
                                                    (1,400)C   57,488
      Restructuring and
       Other Charges, net     14,337       542           -     13,795
                          ----------- --------- ----------- ----------
              Operating
               Expenses      135,905    12,371       1,448    124,982

(Loss)/Income From
 Operations                  (32,264)    5,855      (1,300)   (39,419)

      Interest Income          3,972        -        3,931 D    7,903
      Interest Expense        (4,059)       -            -     (4,059)
                          ----------- --------- ----------- ----------
(Loss)/Income Before
 Income Taxes               $(32,351)   $5,855      $2,631   $(35,575)
                          =========== ========= =========== ==========


                           For the nine months ended October 2, 2005
                          --------------------------------------------
                             GAAP     TCS GAAP   Pro Forma  Pro Forma
                           Teradyne    Segment  Adjustments  Teradyne
                                       Results
                          ----------- --------- ----------- ----------
Net Revenues              $1,012,445  $282,364          $-   $730,081

      Cost of Revenues       683,034   229,104        (445)A  453,485
                        
      Cost of Revenues- 
       Provision for 
       non-FLEX
        Semiconductor 
         Test products        38,465         -           -    38, 465
                          ----------- --------- ----------- ----------

Gross Profit                 290,946    53,260         445    238,131

Operating Expenses:
      Engineering and                                      
       Development           181,414     7,959        (211)A  173,244
      Selling and                                          
       Administrative        198,166    29,124        (515)A
                                                     9,184 B
                                                    (4,200)C  173,511
      Restructuring and
       Other Charges, net     35,160     7,124           -     28,036
                          ----------- --------- ----------- ----------
              Operating
               Expenses      414,740    44,207       4,259    374,791

(Loss)/Income From
 Operations                 (123,794)    9,053      (3,814)  (136,660)

      Interest Income         12,218         -      11,794 D   24,012
      Interest Expense       (12,646)        -           -    (12,646)
                          ----------- --------- ----------- ----------
(Loss)/Income Before
 Income Taxes              $(124,222)   $9,053      $7,980  $(125,294)
                          =========== ========= =========== ==========


  A   To remove Connection Systems variable compensation expense which
       has historically been recorded in the Corporate and
       Eliminations segment.

  B   To add back the corporate allocation of G&A expenses
       historically allocated to Connection Systems which are not
       expected to be eliminated as a result of the divestiture of
       Connection Systems.

  C   Assumed G&A savings not directly related to the divestiture,
       which are expected to be realized by Q1 of 2006.

  D   Interest income on assumed net proceeds of $370 million at an
       assumed annual rate of 4.25%.