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TI-30
The TI-30 was a scientific calculator manufactured by Texas Instruments, the first model of which was introduced in 1976. While the original TI-30 left production in 1983 after several design revisions, TI maintains the TI-30 designation as a branding for its low and mid-range scientific calculators.
==Price==
The original TI-30 was notable for its very low cost for the time, around US$25. This was much less than the retail prices of other scientific calculators of the era; for example, Hewlett-Packard's cheapest scientific calculator at the time was still well over $100. The Casio FX-20, another popular scientific calculator, sold for roughly double the price of the TI-30. The TI-30 sold for less than the cost of a professional grade slide rule. The TI-30 sold an estimated 15 million units during its lifespan from 1976–1983.
Although the MSRP in the US was US$24.95 at introduction, it is rumored that the original TI-30 got its name from a planned retail price of US$29.95 or $30.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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