coded decimal calculating machine

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• Binary-coded decimal — In computing and electronic systems, binary coded decimal (BCD) is a digital encoding method for numbers using decimal notation, with each decimal digit represented by its own binary sequence. In BCD, a numeral is usually represented by four bits …   Wikipedia

• computer — computerlike, adj. /keuhm pyooh teuhr/, n. 1. Also called processor. an electronic device designed to accept data, perform prescribed mathematical and logical operations at high speed, and display the results of these operations. Cf. analog… …   Universalium

• History of computing hardware — Computing hardware is a platform for information processing (block diagram) The history of computing hardware is the record of the ongoing effort to make computer hardware faster, cheaper, and capable of storing more data. Computing hardware… …   Wikipedia

• Calculator — For mechanical precursors to the modern calculator, see mechanical calculator. For other uses, see Calculator (disambiguation). An electronic pocket calculator with a 7‑segment LCD display, that can perform basic arithmetic operations …   Wikipedia

• Floating point — In computing, floating point describes a method of representing real numbers in a way that can support a wide range of values. Numbers are, in general, represented approximately to a fixed number of significant digits and scaled using an exponent …   Wikipedia

• Punched card — Overpunch redirects here. For the code, see Signed overpunch. A punched card, punch card, IBM card, or Hollerith card is a piece of stiff paper that contains digital information represented by the presence or absence of holes in predefined… …   Wikipedia

• cryptology — cryptologist, n. cryptologic /krip tl oj ik/, cryptological, adj. /krip tol euh jee/, n. 1. cryptography. 2. the science and study of cryptanalysis and cryptography. [1635 45; < NL cryptologia. See CRYPTO , LOGY] * * * Introduction …   Universalium

• History of general purpose CPUs — The history of general purpose CPUs is a continuation of the earlier history of computing hardware. 1950s: early designs Each of the computer designs of the early 1950s was a unique design; there were no upward compatible machines or computer… …   Wikipedia

• Computing — For the formal concept of computation, see computation. For the magazine, see Computing (magazine). For the scientific journal, see Computing (journal). A difference engine: computing the solution to a polynomial function …   Wikipedia

• Abacus — For other uses, see Abacus (disambiguation). A Chinese abacus …   Wikipedia

• Tandem Computers — A Tandem Computers promotional mug Tandem Computers, Inc. was the dominant manufacturer of fault tolerant computer systems for ATM networks, banks, stock exchanges, telephone switching centers, and other similar commercial transaction processing… …   Wikipedia