The TI-81 was the first graphing calculator made by Texas Instruments. It was designed in 1990 for use in algebra and precalculus courses.

View and Download Texas Instruments TI-81 manual book online. TI TI-81: User Guide. TI-81 calculator pdf manual download.

Texas Instruments entered the market of Graphing calculators in 1990 with the TI-81, a market prepared by the Casio fx-7000G, the world's first Graphing calculator.

The TI-81, TI's first graphing calculator, was designed for algebra and precalculus. It has since been replaced by newer models which have faster processors, more memory, and popular features such as linking capability and flash upgradability.

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2021年8月27日 · Texas Instruments TI-81 Manual Online. Download or read online manual, installation instructions, specifications, pictures and questions and answers

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Graphing technology has changed dramatically since TI first introduced the TI-81 in 1990. Products now boast operating systems that can be electronically upgraded via the Internet, calculator software applications (Apps) for adding specific functionality, and peripherals for data collection and real-world experimentation.