Sentence:  February 25, 1998  Exhibitor Deadline <WSD>COB</WSD> - Ad Copy Deadline <WSD>COB</WSD> - FINAL PROGRAM COPY DUE TO PROGRAM CHAIR (<WSD>COB</WSD>) 
Meaning of the word marked with <WSD> tags:  Close of Business, usually referring to a deadline for an office in another time zone.