yann64andClaude Opus 5.5
35ede38dde
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01YDRjtmAiNpo5mK5N3d7QwZ
31 lines
1.4 KiB
Markdown
31 lines
1.4 KiB
Markdown
---
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title: FIRST TEXAS INSTRUMENTS TI-57 SALES
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date: '1977-07-01'
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years:
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- '1977'
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topics:
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- Hardware
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params:
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when: JULY 1977
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image: /media/history/images/texas_ti57_system_1.jpg
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oc_id: 29
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source:
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url: https://web.archive.org/web/20220322023408/http://www.old-computers.com/history/detail.asp?n=29
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date: '2022-03-22'
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---
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The **TI-57**, **TI-58** and **TI-59** programmable calculators were revealed to the public in May of 1977. Sales of the TI-57 started in July, and in August for the TI-58 and 59 (as we will see next month).
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It will become the most sold programmable calculator in the world. Though inexpensive ($80), the TI-57 is a technological prowess. It is the only programmable calculator with all functions centralized in a single integrated circuit.
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A low consumption MOS/LSI circuit does the work of 30,000 transistors. It features a 4 bits microprocessor, 50 program steps in RAM and a ROM command software. A new coding method allows to save in one programming step up to three keys entries (as in : Inv-2nd-cos).
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All these characteristics are largely inspired by Hewlett Packard's latest products, HP being Texas Instrument's largest competitor in this area.
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The TI-57 will also be sold through **Radio Shack** under the name of **EC-4000**.\
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TI-57 production will end in 1982.
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