adj. (Computer Science) designating the period prior to the introduction of computers; occurring or existing in this period.

What are pre computers?

: used or existing before computers precomputer record keeping the precomputer era.

What is computer and history of computer?

Charles Babbage, an English mechanical engineer and polymath, originated the concept of a programmable computer. Considered the "father of the computer",he conceptualized and invented the first mechanical computer in the early 19th century.