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128 × 79 × 15 mm The HP-16C Computer Scientist is a programmable pocket calculator that was produced by Hewlett-Packard between 1982 and 1989. It was specifically designed for use by computer programmers , to assist in debugging .
The HP 48 is a series of graphing calculators designed and produced by Hewlett-Packard from 1990 until 2003. [1] The series includes the HP 48S, HP 48SX, HP 48G, HP 48GX, and HP 48G+, the G models being expanded and improved versions of the S models.
A Battery: Eveready 742: 1.5 V: Metal tabs H: 101.6 L: 63.5 W: 63.5 Used to provide power to the filament of a vacuum tube. B Battery: Eveready 762-S: 45 V: Threaded posts H: 146 L: 104.8 W: 63.5 Used to supply plate voltage in vintage vacuum tube equipment. Origin of the term B+ for plate voltage power supplies.
1 CR1616 or CR1620 (backup battery) The TI-85 is a graphing calculator made by Texas Instruments based on the Zilog Z80 microprocessor . Designed in 1992 as TI's second graphing calculator (the first was the TI-81 ), it was replaced by the TI-86 , which has also been discontinued.
The TI-84 Plus C Silver Edition was released in 2013 as the first Z80-based Texas Instruments graphing calculator with a color screen.It had a 320×240-pixel full-color screen, a modified version of the TI-84 Plus's 2.55MP operating system, a removable 1200 mAh rechargeable lithium-ion battery, and keystroke compatibility with existing math and programming tools. [6]
128 × 79 × 15 mm The HP-12C is a financial calculator made by Hewlett-Packard (HP) and its successor HP Inc. as part of the HP Voyager series , introduced in 1981. It is HP's longest and best-selling product and is considered the de facto standard among financial professionals.
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40 × 16 characters LCD screen (4.8 inch × 1.8 inch) Graphics: 240 × 128 pixels (quarter-CGA resolution) monochrome STN, 2 scales: Sound: PC speaker (piezo) Input: Thumb keyboard with 80 keys and a dedicated numeric keypad [5] [6]: 76 [7] Connectivity: RS-232-compatible serial port, infrared port, PCMCIA 1.0 type II (3.3 mm or 5 mm) Power