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Summary
| Description |
English: Block diagram of the IBM Selective Sequence Electronic Calculator (SSEC). Designed starting in late 1944, it was demonstrated in January 1948. It was the first computer to be able to treat its own insrtuctions exactly as data. However, most of its memory was in the form of relays and punched tapes, so the capability was not used except rarely. It was the last large electro-mechanical calculator built. |
| Date | |
| Source | Figure 1 from US Patent 2,636,672. "Selective Sequence Electronic Calculator" F.E. Hamilton, R.R. Seeber, R.A. Rowley, and E.S. Hughes (January 19, 1949). Issued April 28, 1953. |
| Author | Joseph Robbins was patent attorney for IBM |
Licensing
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This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code.
Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 22:59, 28 April 2011 | | 2,120 × 1,592 (854 KB) | W Nowicki | {{Information |Description ={{en|1=Block diagram of the IBM Selective Sequence Electronic Calculator (SSEC). Designed starting in late 1944, it was demonstrated in January 1948. It was the first computer to be able to treat its own ins |
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