UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3)* KLA -Tencor Corporation (Name of Issuer) Common Stock (Title of Class of Securities) 482480100 (CUSIP Number) December 31, 2002 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: [X] Rule 13d-1(b) [ ] Rule 13d-1(c) [ ] Rule 13d-1(d) *The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page. The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes). CUSIP: 482480100 Page 1 of 4 1报告国税局识别人的名字NOS. OF ABOVE PERSONS (ENTITIES ONLY) Capital Research and Management Company 95-1411037 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) (b) 3 SEC USE ONLY 4 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware 5 SOLE VOTING POWER NONE 6 SHARED VOTING POWER NUMBER OF SHARES NONE BENEFICIALL Y OWNED BY 7 SOLE DISPOSITIVE POWER EACH REPORTING 9,481,680 PERSON WITH: 8 SHARED DISPOSITIVE POWER NONE 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 9,481,680 Beneficial ownership disclaimed pursuant to Rule 13d-4 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 5.0% 12 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) IA CUSIP: 482480100 Page 2 of 4 美国证券交易委员会华盛顿特区20549计划13G根据1934年的《证券交易法》第3号修正案1（a）发行人的名称：KLA -tencor Corporation项目1（b）发行人首席行政部门的地址：160 RIO ROBLES SAN SAN何塞，加利福尼亚州95134项目2（a）人名称：资本研究与管理公司项目2（b）主要商务办公室的地址或（如果没有）住所：333 South Hope Street Lobeplay官网ueds Street Los Angeles，CA 90071，CA 90071项目2项目2（c）公民身份：N/A项目2（d）证券类标题：普通股项目2（e）CUSIP编号：482480100项目3如果此陈述是根据第240.13D-1（b）或240.13节提交的。D-2（b）或（c），检查人员是否为：（e）[x]根据第240.13d-1（b）（1）（ii）（e）条的投资顾问。项目4所有权提供了以下有关项目1中确定的发行人证券类的总数和百分比的信息。该人拥有的：（i）唯一有权投票或指挥投票：（ii）共享投票权或指导投票的权力：（iii）唯一的权力处置或指导处置：（iv）共享处置或指导处置的权力：资本研究和管理公司，根据1940年《投资顾问法》第203条注册的投资顾问被视为9,481,680股的津贴，或188,689,000股股票中的5beplay官网ued.0％据信是由于1940年《投资公司法》第8条注册的各种投资公司的投资顾问而被杰出的。beplay官网ued Item 5 Ownership of Five Percent or Less of a Class. If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following: [ ] Item 6 Ownership of More than Five Percent on Behalf of Another Person: N/A Item 7 Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company or Control Person.: N/A Item 8 Identification and Classification of Members of the Group: N/A Item 9 Notice of Dissolution of Group: N/A Item 10 Certification By signing below, I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. Signature After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Date: February 10, 2003 Signature: *Paul G. Haaga, Jr. Name/Title: Paul G. Haaga, Jr., Executive Vice President Capital Research and Management Company *By /s/ Anna Jacobs Griffith Anna Jacobs Griffith Attorney-in-fact Signed pursuant to a Power of Attorney dated January 9, 2002 included as an Exhibit to Schedule 13G filed with the Securities and Exchange Commission by Capital Research and Management Company on January 10, 2002 with respect to HotJobs.Com, Ltd CUSIP: 482480100 Page 4 of 4