PERSONNEL FILE . . . The Federal Home Loan Mortgage Corp. (Freddie Mac) has promoted George F. Border to senior vice president of corporate information resources. He will be responsible for management of data processing, communications and office automation for the corporation . . . Freddie Mac also notes the reappointment of Fred Napolitano to its advisory committee. Napolitano, a builder from Virginia Beach, is immediate past president of the National Association of Home Builders . . . The Apartment and Office Building Association has named Donald R. Slatton executive vice president. He took office this week . . . The National Apartment Association has named Scott Slesinger acting executive vice president. He will continued also to be the association's director of government relations . . . The first Milton E. Kettler Award, given by REAL ESTATE NOTES the Suburban Maryland Home Builders Association, has gone to Robert L. Mitchell, president of C-I/Mitchell & Best of Rockville, for his efforts on behalf of the housing industry, the association and the community as a whole . . . CEI Construction has given its first community service award to Fred L. Valentine, director of equal employment opportunity at the George Hyman Construction Co., a CEI subsidiary. IN THE BUSINESS . . . Construction has begun in Ocean City, Md., on the 10-story Excalibur condominium, the tallest undertaken there in a decade, according to its managers, Financial Associates of Maryland. The owner/developer is a partnership called Excalibur Associates. The building will offer 70 two- and three-bedroom units starting at $92,500 . . . Paul M. Yentis of the Kay Management Co. will discuss condominium management vs. rental management at the March 21 dinner meeting of the Northern Virginia Apartment Association. For information, call 671-6777 . . . The boom is bustin' out all over. Shannon & Luchs' Virginia division reports sales of 212 houses in February, its best month ever and a 93 percent increase over February of last year. The Virginia sales volume was just under $23 million. The firm's Maryland/D.C. division racked up $43.4 million in sales for the month on sales of 360 homes. That was a 59 percent rise from last year. And Ridge Development Corp. reports 112 sales since the first of the year at Lake Ridge, its 3,500-acre planned community on the Fairfax-Prince William line . . . The National Trust for Historic Preservation is sponsoring a three-day program in downtown revitalization. The program, scheduled to begin Monday, is for architects, planners and city officials interested in learning more about how to improve their towns' images and economies. ON THE MOVE . . . Coldwell Banker notes some significant new leases in Northern Virginia in which the firm was involved: Advanced Technology, Inc., management consultants, has leased the 100,000-square-foot West Building of Cascades Center in Reston for an aggregate long-term rental of more than $6 million. IBM has let 15,000 square feet of office and industrial space from Hunter Bay Associates in Manassas. The World Bank has leased 48,000 square feet of inventory space at the Virginia 95 Industrial Park . . . Wider Opportunities for Women, a non-profit employment organization, has leased 17,812 square feet at 1325 G St. NW. Smithy Braedon represented the landlord and Walker and Dunlop represented WOW.