What Happened in April Apr 01 1922 Computer Pioneer Alan J. Perlis Born Apr 02 1980 Microsoft Announces "SoftCard" Apr 03 1617 Scottish Mathematician Napier Dies Apr 04 1994 Marc Andreessen Founds Netscape with Jim Clark Apr 05 1911 Computer Pioneer Cuthbert Hurd Born Apr 06 1992 Microsoft Releases Windows 3.1 Apr 07 1964 IBM Announces "System 360" Computer Family Apr 08 1991 Java Development Begins in Earnest Apr 09 1943 ENIAC Contract Signed Apr 10 1981 Shuttle Launch Delayed Apr 11 1936 German Computer Designer Zuse Files for Patent Apr 12 1981 HP-41 Calculator Used in Space Apr 13 1909 Mathematics Pioneer Ulam Born Apr 14 1995 Chinese Government Works to Purge its Agencies of Illegal Software Apr 15 1977 First West Coast Computer Faire Begins Apr 16 1959 "LISP" Language Unveiled Apr 17 1944 Harvard Mark I Operating Apr 18 1986 IBM First to Use Megabit Chip Apr 19 1957 First FORTRAN Program Runs Apr 20 1951 MIT "Whirlwind" Computer Seen on Television Apr 21 1988 Tandy Plans to Build IBM PS/2 Clones Apr 22 1592 Mechanical Calculator Designer Schickard Born Apr 23 1964 SEAC Computer Retired Apr 24 1981 Apple IIc Introduced Apr 25 1961 Noyce Awarded Patent for "Integrated Circuit" Apr 26 1960 IBM Announces "STRETCH" Supercomputer Plans Apr 27 1995 Justice Department Sues to Block Microsoft Purchase of Intuit Apr 28 1994 US Companies Get Aid from Government Apr 29 1928 Laszlo Belady Born Apr 30 1904 Computer Pioneer George Stibitz Born Apr 30 1916 Information Theory Pioneer Claude Shannon Born
