The technological "brains" inside a computer that enables it to rapidly process data has quickly evolved over the years:
From using electro-mechanical relays & vacuum tubes in the 1940's, transistors in the 1950's, Micromodules, Hybrid Integrated Circuits & Solid Logic Technology in the 1960's, integrated circuits in the 1970's, to Very Large Scale Integrated circuits (VLSI) used from the 1980's until today.
The Evolution of Computer Logic Technology
1940s 1950s 1960s 1970s
Computer Memory Technology Timeline
Other Computer Related Technologies