SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
Under the Securities Exchange Act of 1934
Amendment No. 1
Name of
Issuer: KLA INSTRUMENTS CORP
____________________________________________________________________
Title of Class
of Securities: Common Stock
CUSIP Number: 482480100
1) NAME OF I.R.S. IDENTIFICATION NO. OF REPORTING PERSON
The Prudential Insurance Company of America 22-1211670
2) MEMBER OF A GROUP: (a) N/A
(b) N/A
3) SEC USE ONLY:
4) PLACE OF ORGANIZATION: A mutual insurance company organized
under the laws of the State of New Jersey
NUMBERS OF SHARES BENEFICIALLY OWNED BY REPORTING PERSON WITH:
5) Sole Voting Power: 452,600 See Exhibit A
6) Shared Voting Power: 4,288,487 See Exhibit A
7) Sole Dispositive Power: 452,600 See Exhibit A
8) Shared Dispositive Power: 4,675,887 See Exhibit A
9) AGGREGATE AMOUNT BENEFICIALLY OWNED: 5,128,487 See Exhibit A
10) AGGREGATE AMOUNT IN ROW (9) EXCLUDES SHARES: N/A
11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9): 10.1See Exhibit A
12) TYPE OF REPORTING PERSON: BD, IC, IA
ITEM 1(a). NAME OF ISSUER:
KLA INSTRUMENTS CORP
ITEM 1(b). ADDRESS OF ISSUER'S EXECUTIVE OFFICES:
160 Rio Robles
San Jose, CA 95161
ITEM 2(a). NAME OF PERSON FILING:
The Prudential Insurance Company of America
ITEM 2(b). ADDRESS OF PRINCIPAL BUSINESS OFFICE:
Prudential Plaza
Newark, New Jersey 07102-3777
ITEM 2(c). CITIZENSHIP:
A mutual insurance company organized under the laws
of the State of New Jersey
ITEM 2(d). TITLE OF CLASS SECURITIES:
Common Stock
ITEM 2(e). CUSIP NUMBER:
482480100
ITEM 3. The Person filing this statement is an Insurance Company
as defined in Section 3(a)(19) of the Securities Exchange
Act of 1934, a Broker-Dealer registered under Section 15
of that Act and an Investment Adviser registered under
Section 203 of the Investment Advisers Act of 1940.
ITEM 4. OWNERSHIP:
(a) Number of Shares
Benefically Owned: 5,128,487 See Exhibit A
(b) Percent of Class: 10.1 See Exhibit A
Number
(c) Powers Of Shares
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Sole power to vote or 452,600 See Exhibit A
to direct the vote
Shared power to vote or 4,288,487 See Exhibit A
to direct the vote
Sole power to dispose or 452,600 See Exhibit A
to direct disposition
Shared power to dispose 4,675,887 See Exhibit A
or to direct disposition
ITEM 5. OWNERSHIP OF 5% OR LESS OF A CLASS:
Not Applicable
ITEM 6. OWNERSHIP OF MORE THAN 5% ON BEHALF OF ANOTHER PERSON:
See Exhibit A
ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY
WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE
ULTIMATE PARENT COMPANY:
Not Applicable
ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP:
Not Applicable
ITEM 9. NOTICE OF DISSOLUTION OF GROUP:
Not Applicable
ITEM 10. CERTIFICATION:
By signing below, The Prudential Insurance Company of America
certifies that, to the best of its knowledge and belief, the
securities referred to above were acquired in the ordinary course
of business and were note acquired for the purpose of and do not
have the effect of changing or influencing the control of the
issuer of such securities and were not acquired in connection
with or as a participant in any transaction having such purpose
or effect.
The filing of this statement should not be construed as an
admission that Prudential is, for purposes of Sections 13(d) or
13(g) of the Securities Exchange Act of 1934, the beneficial owner
of such shares.
SIGNATURE
After reasonable inquiry and to the best of its knowledge and
belief, The Prudential Insurance Company of America certifies that
the information set forth in this statement is true, complete and
correct.
THE PRUDENTIAL INSURANCE COMPANY OF AMERICA
By: Derek D. Burke
Director, Securities Law Compliance
Date: June 10, 1996
As of: May 31, 1996
Exhibit A
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ITEM 6. OWNERSHIP OF MORE THAN 5% ON BEHALF OF ANOTHER PERSON:
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The Prudential Insurance Company of America ("Prudential") may have
direct or indirect voting and/or investment discretion over
5,128,487 shares of the Issuer's common stock which are held for
the benefit of its clients by its separate accounts, externally
managed accounts, registered investment companies, subsidiaries
and/or other affiliates. Prudential is reporting the combined
holdings of these entities for the purpose of administrative
convenience.
These shares were acquired in the ordinary course of business, and
not with the purpose or effect of changing or influencing control
of the Issuer. The filing of this statement should not be
construed as an admission that Prudential is, for the purposes of
Sections 13 or 16 of the Securities Exchange Act of 1934, the
beneficial owner of these shares.
