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Computer Models Database
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 | Manufacturer | Model | Category | Sub-Category | Date  |
 | British Tabulating Machine (BTM) | 1400 | Mainframe | Early | 1959< |
| 1202 | Mainframe | Early | 1958 | ||
| 1201 (aka HEC 4) | Mainframe | Early | 1956 | ||
| 1200 (aka HEC 2 M) | Mainframe | Early | 1954 | ||
| HEC 2 | Mainframe | Early | 1953 | ||
| HEC (aka Hollerith Electronic Computer) (aka Ape(h)c) | Mainframe | Early | 1951 |
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