Hollerith punched card
Tarjeta perforada Hollerith
- Date
- 1884–1890 · confidence high
- Place
- Washington, D.C., United States
- Credited to
- Herman Hollerith (1890 US census)
- People
- 👤 Herman Hollerith1860–1929
- Field
- Knowledge & symbols
What it is
Card made of card stock with punched holes encoding data, read electrically. It cut census processing time from eight years to one.
What it led to
- Mechanised data processing in state and business
- Tabulating Machine Company (1896) and IBM (1924)
- Input format of early computers
Built on
- Jacquard loom with punched cards1804
- Electric telegraph1837
- Jacquard loom card
- Modern census