Fourth Generation (Early 70s to present)
Large Scale Integration (several thousand transistors on a single chip) to ...
Very Large Scale Integration (millions of transistors on a single chip) to ...
Ultra Large Scale Integration (over a billion transistors on a single chip).
Smaller components, more power, decreasing cost per unit of power summed up in Moore's Law.
By mid-70s the whole Central Processing Unit could be put on a chip, called a microprocessor
(The microprocessor is the square chip in the lower left corner on the printed circuit board below.)
