electronic subtraction
31cryptology — 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 …
32computer science — computer scientist. the science that deals with the theory and methods of processing information in digital computers, the design of computer hardware and software, and the applications of computers. [1970 75] * * * Study of computers, their… …
33Three-phase — This article deals with the basic mathematics and principles of three phase electricity. For information on where, how and why three phase is used, see three phase electric power. In electrical engineering, three phase electric power systems have …
34Dash — Not to be confused with Hyphen or Minus sign. This article is about the punctuation mark. For other uses, see Dash (disambiguation). For guidelines on dash usage in Wikipedia, see Wikipedia:Manual of Style#Dashes …
35Matrix (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)… …
36Copyright law of the United States — The copyright law of the United States governs the legally enforceable rights of creative and artistic works under the laws of the United States. Copyright law in the United States is part of federal law, and is authorized by the U.S.… …
37John Mauchly — Infobox Scientist name = John Mauchly box width = image width =150px caption = Eckert and Mauchly examine a printout of ENIAC results in a newsreel from February 1946. birth date = August 30 1907 birth place = Cincinnati, Ohio death date =… …
38Timeline of computing hardware 2400 BC–1949 — History of computing Hardware before 1960 Hardware 1960s to present Hardware in Soviet Bloc countries Artificial intelligence Computer science Operating systems Programming languages …
39Abacus — For other uses, see Abacus (disambiguation). A Chinese abacus …
40Turing machine — For the test of artificial intelligence, see Turing test. For the instrumental rock band, see Turing Machine (band). Turing machine(s) Machina Universal Turing machine Alternating Turing machine Quantum Turing machine Read only Turing machine… …
