Another important advance in technology would be the transistor, although it’s not a computer it greatly affected them. It allowed computers to divert power to separate parts of the computer so they could do several things at once, or quickly switch to another function.
The integrated circuit was really important to the evolution of the computer. The integrated circuit was able to replace vacuum tubes on computers, allowing them to be made smaller and more convenient.
In 1971 the very first microprocessor was invented. This allowed all of the necessary components in a computer to be stored in a compact form. Allowing designers to be able to make computers smaller than they ever could.