RULIFSON, JOHNS FREDERICK, computer company executive, computer scientist; b. Bellefontaine, Ohio, Aug. 20, 1941: s. Erwin Charles and Virginia Helen (Johns) R; m Janet Irving, June 8, 1963; children: Eric Johns, Ingrid Catharine. BS in Math., U. Wash., 1966; PhD in Computer Sci., Stanford U., 1973. Mathematician SRI, Internat., Menlo Park, Calif., 1966-73; scientist Xerox Rsch., Palo Alto, Calif., 1973-80; mgr. ROLM, Santa Clara, Calif., 1980-1985; Scientist Syntelligence, Sunnyvale, Calif., 1985-87; exec. Sun Microsystems, Mountain View, Calif., 1987---. Fellow Assn. for Computing Machinery (Systems Software 1990); mem. IEEE. Home: 3785 El Centro Ave Palo Alto CA 94306-2642 Office: Sun Microsystems 2550 Garcia Ave Mountain View CA 94043