computer calculator
51Mechanical calculator — An old Russian mechanical calculator. A mechanical calculator is a device used to perform the basic operations of arithmetic. Mechanical calculators are comparable in size to small desktop computers and have been rendered obsolete by the advent… …
52Graphing calculator — A graphing calculator (also known as a graphic calculator or graphical calculator) typically refers to a class of handheld calculators that are capable of plotting graphs, solving simultaneous equations, and performing numerous other tasks with… …
53Sumlock ANITA calculator — The ANITA Mark VII and ANITA Mark VIII calculators were launched simultaneously in late 1961 as the world s first all electronic desktop calculators. Designed and built by the Bell Punch Co. in Britain, and marketed through its Sumlock… …
54Programmable calculator — Programmable calculators are calculators capable of being programmed much like a computer.Since the early 1990s, most of these flexible handheld units belong to the class of graphing calculators. Before the mass manufacture of inexpensive dot… …
55Little man computer — The Little Man Computer (LMC) was created by Dr. Stuart Madnick as an instructional model. The LMC models a simple von Neumann architecture computer, so it has all of the basic features of a modern computer. The LMC can be programmed in machine… …
56Power supply unit (computer) — Power supply unit with top cover removed A power supply unit (PSU) supplies direct current (DC) power to the other components in a computer. It converts general purpose alternating current (AC) electric power from the mains (110 V to… …
57Comparison of computer algebra systems — The following tables provide a comparison of computer algebra systems (CAS). Contents 1 General 1.1 Functionality 1.2 Operating system support 2 Hand held calculator CAS …
58Apollo Guidance Computer — and DSKY Invented by MIT Instrumentation Laboratory Manufacturer Raytheon Introduced August 1966 …
59Expensive Desk Calculator — Infobox Software name = Expensive Desk Calculator caption = DEC PDP 1 at the Computer History Museum author = Robert A. Wagner developer = released = 1960s latest release version = latest release date = latest preview version = latest preview… …
60Mechanical computer — Hamman Manus R A mechanical computer is built from mechanical components such as levers and gears, rather than electronic components. The most common examples are adding machines and mechanical counters, which use the turning of gears to… …
