1940
1950
1960
1970
1980
1990
2000
Vacuum tube
Transistor
Large
scale integration - 1971-1977
3 – 100K devices on a chip, semi conductor memory
Very
large scale integration - 1978 to date
100K – 100M
devices on a chip
Ultra
large scale integration
Over 100M devices
on a chip
Small
scale integration - 1965 on
Up to 100 devices
on a chip
Medium
scale integration - to 1971
100-3,000 devices
on a chip
Generations of Computer