This episode's headline: Microsoft Breakup?; Legacy; Converation; Favorite Poem Project. ANCHOR: JIM LEHRER; GUESTS: PAUL KEDROSKY, University of British Columbia; KATIE HAFNER, The New York Times; JARON LANIER, Computer Scientist; LOU CANNON, Author, ""President Reagan"" The Role of a Lifetime""; STEPHEN CONTEAGUERO, U.S. Marine Corps; CORRESPONDENTS: MIKE JAMES; TERENCE SMITH; BETTY ANN BOWSER; SUSAN DENTZER; RAY SUAREZ; SPENCER MICHELS; MARGARET WARNER; FRED DE SAM LAZARO; GWEN IFILL; TERENCE SMITH; KWAME HOLMAN