Historically, computers evolved from mechanical computers and eventually from vacuum tubes to transistors. However, conceptually computational systems as flexible as a personal computer can be built out of almost anything. For example, a computer can be made out of billiard balls (billiard ball computer); an often quoted example.[citation needed] More realistically, modern computers are made out of transistors made of photolithographed semiconductors.
Historically , computers evolved from mechanical computers and eventually from vacuum tubes to transistors . However , conceptually computational systems as flexible as a personal computer can be built out of almost anything . For example , a computer can be made out of billiard balls ( billiard ball computer ) ; an often quoted example.[citation needed ] More realistically , modern computers are made out of transistors made of photolithographed semiconductors .
Transistors are typically made up of what today?
Transistors are typically made up of what today ?
photolithographed semiconductors
photolithographed semiconductors