Keypunch is an outdated term that was used to refer to a manual data entry technique that uses punch cards. This method was widely popular in the mid-20th century before computers became widely accessible. Although the term keypunch is not very common today, there are several synonyms that can be used in its place. For example, data entry, data input, typing, or numerical input are all terms that can be used as synonyms for keypunch. These terms refer to the process of manually entering data into a digital system, which is still done today, albeit less commonly than before.