desktop calculator
21Comptometer — Model ST (1930s) …
22History of personal computers — This article covers the history of the personal computer. A personal computer is one which is directly used by an individual, as opposed to a mainframe in which the end user s requests are filtered through an operating staff, or a time sharing… …
23HP calculators — refer to various calculators manufactured by the Hewlett Packard company over the years. History In the 1960s, Hewlett Packard was becoming a diversified electronics company with product lines in electronic test equipment, scientific… …
24Wang Laboratories — Infobox Company company name = Wang Laboratories company company type = Incorporation foundation = Cambridge, Massachusetts, USA (1951) location = Tewksbury, Massachusetts , USA (1963–1976) Lowell, Massachusetts, USA (1976–1997) key people = Dr.… …
25Hewlett-Packard — Coordinates: 37°24′49″N 122°08′42″W / 37.413579°N 122.14508°W / 37.413579; 122.14508 HP red …
26Reverse Polish notation — (or just RPN) by analogy with the related Polish notation, a prefix notation introduced in 1920 by the Polish mathematician Jan Łukasiewicz, is a mathematical notation wherein every operator follows all of its operands. It is also known as… …
27Motorola 6800 — Motorola MC6800 Microprocessor. The 6800 was an 8 bit microprocessor designed and first manufactured by Motorola in 1974. The MC6800 microprocessor was part of the M6800 Microcomputer System that also included serial and parallel interface ICs,… …
28Dynamic random-access memory — DRAM redirects here. For other uses, see Dram (disambiguation). Computer memory types Volatile RAM DRAM (e.g., DDR SDRAM) SRAM In development T RAM Z RAM TTRAM Historical Delay line memory Selectron tube Williams tube …
29Hewlett-Packard Company — ▪ American company Introduction American manufacturer of computers, computer peripherals, and instrumentation equipment. Headquarters are in Palo Alto, California. Founding and early growth The company was founded on January 1, 1939, by… …
30Casio — Infobox Company company name = Casio Computer Co., Ltd. カシオ計算機株式会社 company company type = Public ( [http://quote.tse.or.jp/tse/quote.cgi?F=listing/EDetail1 MKTN=T QCODE=6952 Casio on TSE] ) company slogan = foundation = Tokyo (1946) location =… …
