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The μWatch, an open-source DIY scientific calculator watch Casio CMD-40 calculator watch with built-in remote control The Casio TC500 touch sensor calculator watch from 1983. It uses a capacitive touch screen for the calculator and function buttons. A calculator watch is a digital watch with a built-in calculator, usually including buttons on ...
Casio CD-401, one of the first Data Bank watches from 1983 A Casio DBC-610 Databank calculator watch Casio DBA-800 Databank, the world's first phone dialer watch. Casio Databank (often styled as CASIO DATA BANK) is a series of digital watches and electronic personal organizers manufactured by Casio. The watches allow data storage for names and ...
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By 1970, a calculator could be made using just a few chips of low power consumption, allowing portable models powered from rechargeable batteries. The first handheld calculator was a 1967 prototype called Cal Tech, whose development was led by Jack Kilby at Texas Instruments in a research project to produce a portable calculator. It could add ...
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A simple arithmetic calculator was first included with Windows 1.0. [5]In Windows 3.0, a scientific mode was added, which included exponents and roots, logarithms, factorial-based functions, trigonometry (supports radian, degree and gradians angles), base conversions (2, 8, 10, 16), logic operations, statistical functions such as single variable statistics and linear regression.
The first scientific calculator that included all of the basic ideas above was the programmable Hewlett-Packard HP-9100A, [5] released in 1968, though the Wang LOCI-2 and the Mathatronics Mathatron [6] had some features later identified with scientific calculator designs.
A remote terminal unit (RTU) is a microprocessor-controlled electronic device that interfaces objects in the physical world to a distributed control system or SCADA (supervisory control and data acquisition) system by transmitting telemetry data to a master system, and by using messages from the master supervisory system to control connected objects. [1]