# keypunch

> machine for entering data on punched cards

**Wikidata**: [Q2040518](https://www.wikidata.org/wiki/Q2040518)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Keypunch)  
**Source**: https://4ort.xyz/entity/keypunch

## Summary
A keypunch is a machine for entering data on punched cards, serving as an input device for information processing systems. It was used to create punched cards by manually or mechanically punching holes in specific positions, which could then be read by computers or tabulating machines. The keypunch was a critical tool in early computing and data processing, particularly in the mid-20th century.

## Key Facts
- A keypunch is an input device used to enter data onto punched cards.
- It operates by punching holes in specific positions on a card, which represent data.
- Keypunches were commonly used in conjunction with punched cards, a paper-based recording medium.
- The Dehomag company was associated with the production of keypunch machines.
- Keypunches were practiced by operators, including specialized keypunch operators.
- The term "keypunch" has aliases in multiple languages, including Perforeuse, Poinçonneuse manuelle, and perforatrice à carte.
- Keypunches were distinct from punched card input/output systems.
- The concept of a keypunch is referenced in academic and historical contexts, including in the Microsoft Academic database.
- Keypunch machines are documented in various Wikimedia Commons images and categories.
- The term "keypunch" appears in Wikipedia articles in multiple languages, including English, German, and French.

## FAQs
- What is a keypunch used for? A keypunch is used to enter data onto punched cards by punching holes in specific positions, which can then be processed by computers or tabulating machines.
- How does a keypunch differ from punched card input/output? A keypunch is specifically designed to input data onto punched cards, whereas punched card input/output refers to the broader process of reading and writing data to cards.
- Which companies were involved in producing keypunches? The Dehomag company was associated with the production of keypunch machines.
- Who operates a keypunch? Keypunches were operated by specialized keypunch operators, who were responsible for entering data onto punched cards.
- What are the aliases for keypunch in different languages? The term "keypunch" is known as Perforeuse in German, Poinçonneuse manuelle in French, and perforatrice à carte in Italian.
- How are keypunches referenced in academic contexts? The concept of a keypunch is referenced in the Microsoft Academic database, indicating its historical and technical significance.

## Why It Matters
The keypunch played a crucial role in the early development of computing and data processing. It enabled the manual or mechanical entry of data onto punched cards, which were widely used in tabulating machines and early computers. The keypunch was a key component in the transition from mechanical to electronic computing, facilitating the storage and retrieval of large amounts of data. Its development and widespread use were instrumental in the advancement of information processing technologies.

## Notable For
- Being a critical input device in early computing and data processing systems.
- Facilitating the manual or mechanical entry of data onto punched cards.
- Being associated with the Dehomag company, which produced keypunch machines.
- Having specialized operators who were responsible for entering data onto punched cards.
- Having aliases in multiple languages, reflecting its global use and recognition.
- Being referenced in academic and historical contexts, indicating its technical and historical significance.

## Body
### Overview
A keypunch is a machine designed to enter data onto punched cards, which were a fundamental medium for data storage and processing in early computing. The keypunch was used to create punched cards by punching holes in specific positions, which could then be read by computers or tabulating machines. This process allowed for the efficient storage and retrieval of large amounts of data, making the keypunch a critical tool in the development of computing technologies.

### History and Development
The keypunch was developed as part of the broader evolution of data processing technologies, particularly in the mid-20th century. It was used in conjunction with punched cards, a paper-based recording medium that was widely adopted in tabulating machines and early computers. The keypunch was operated by specialized keypunch operators, who were responsible for entering data onto punched cards. The Dehomag company was associated with the production of keypunch machines, contributing to their development and widespread use.

### Technical Specifications
The keypunch was designed to punch holes in specific positions on a punched card, which represented data. This process allowed for the efficient storage and retrieval of data, making the keypunch a critical component in early computing systems. The keypunch was distinct from punched card input/output systems, which referred to the broader process of reading and writing data to cards. The term "keypunch" has aliases in multiple languages, including Perforeuse, Poinçonneuse manuelle, and perforatrice à carte, reflecting its global use and recognition.

### Academic and Historical Context
The concept of a keypunch is referenced in academic and historical contexts, including in the Microsoft Academic database. This indicates its technical and historical significance, as well as its role in the development of computing technologies. The keypunch is documented in various Wikimedia Commons images and categories, providing visual representations of the machine and its use. The term "keypunch" appears in Wikipedia articles in multiple languages, including English, German, and French, reflecting its widespread recognition and use.

### Cultural and Technological Impact
The keypunch played a significant role in the cultural and technological landscape of the mid-20th century. It facilitated the manual or mechanical entry of data onto punched cards, which were widely used in tabulating machines and early computers. The keypunch was a key component in the transition from mechanical to electronic computing, enabling the storage and retrieval of large amounts of data. Its development and widespread use were instrumental in the advancement of information processing technologies.

## References

1. Freebase Data Dumps. 2013