How did computers change between 1946 and the 1980s?

1946 - ENIAC (Uni of Penns) 5000 Instructions per second
Weight 30 Tons, 18,000 Vacuum Tubes
1948 - Manchester Baby first stored program computer
1948 - Transistor Invented
1951 - Leo I goes operational worlds first non commercial business
computer (for the British Lyons Tea Company)
1951 - Ferranti 1delivered to Manchester University worlds first commercial computer
1951 - Univac 1 goes on sale first commercially available computer
in the US
1952 - CBS use Univac to predict the result of the US Election
1953 - First IBM Computer announced
1956 - Core memory invented and sold to IBM
1956 - First Keyboard used for data entry
1958 - Integrated Circuit is invented
1960 - Dec introduce first mini computer
1962 - First commercial Modem introduced
1963 - Mouse Invented
1966 - Hand held calculator invented by Texas Instruments
1971 - First email sent
1973 - 8" Floppy Disc introduced by IBM
1973 - Internet Invented (NOT www yet!)
1976 - 5.75" Floppy Introduced
1976 - Last Slide Rule Manufactured!
1981 - First "PC" announced by IBM
1983 - Microsoft create Windows
1986 -First Virus
1988 - IBM have sold 3 millionth PC Sold