manual calculator
31Mark XIV bomb sight — The Mk. XIVA sighting head, which would be mounted in the front of the aircraft and connected to the computor by the cables coiled up on the left. The main features are the gyrostabilizer in the large cylinder, and the collimator on the moving… …
32dc (computer program) — dc is a cross platform reverse polish desk calculator which supports arbitrary precision arithmetic.[1] It is one of the oldest Unix utilities, predating even the invention of the C programming language; like other utilities of that vintage, it… …
33Altair 8800 — The MITS Altair 8800 was a microcomputer design from 1975, based on the Intel 8080 CPU and sold as a mail order kit through advertisements in Popular Electronics , Radio Electronics and other hobbyist magazines. The designers intended to sell… …
34Casio — 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 =… …
35Digital read out — DRO providing a three axis display with pitch circle calculator, diameter/radius conversion, absolute and incremental toggle, and inch metric toggle A digital read out (DRO) is a small computer (display unit) usually with an integrated keyboard… …
36Comptometer — Model ST (1930s) …
37Intel 4004 — Intel C4004 microprocessor Produced From late 1971 to 1981 Common manufacturer(s) Intel Max. CPU clock rate …
38Chmod — The chmod command (abbreviated from change mode) is a shell command in Unix and Unix like environments. When executed, the command can change file system modes of files and directories. The modes include permissions and special modes. History A… …
39Social Security (United States) — This article is about the retirement/disability program. For the general concept of providing welfare, see Social security. For other uses, see Social Security (disambiguation) …
40Matrix (mathematics) — Specific elements of a matrix are often denoted by a variable with two subscripts. For instance, a2,1 represents the element at the second row and first column of a matrix A. In mathematics, a matrix (plural matrices, or less commonly matrixes)… …
