History of discovery · Description · Paleobiology · Paleoecology7/13/2004 · The original TI30, a costreduced but functionally equivalent version of TIs SR40 unit, utilized an LED display, was powered by a 9volt battery, and contained nearly all of its functionality in one chip, where previous calculators used many discrete components.The TI30 could perform nearly all the logarithmic and trigonometric functions of an HP21, its primary competition at the time.
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