to serve a (useful) purpose
41Noise (electronics) — Electronic noise [1] is a random fluctuation in an electrical signal, a characteristic of all electronic circuits. Noise generated by electronic devices varies greatly, as it can be produced by several different effects. Thermal noise is… …
42Milton Friedman — Chicago School of Economics Born July 31, 1912(1912 07 31) Brooklyn, New York …
43List of software patents — This is an incomplete list, which may never be able to satisfy particular standards for completeness. You can help by expanding it with reliably sourced entries. Computer programs, software and patent law …
44Tribes (series) — For the biological concept, see tribe (biology). For the social concept, see tribe. Tribes is a series of science fiction first person shooter computer games originally developed by Dynamix, a subsidiary of Sierra Entertainment. Set in the same… …
45number name — Number names can be heard on any Saturday afternoon in Britain during the football season, as the referee of a match talks to the players. It is accepted in such a situation that the referee cannot be expected to remember the names of twenty… …
46Sozomen — Salminius Hermias Sozomenus [Variations on his name include, Salamanes and Salaminius .] (Σωζομενός) (c. 400 c. 450) was a historian of the Christian church. Family and HomeHe was born around 400 in Bethelia, a small town near Gaza, into a… …
47Sue Niederer — Sue Sapir Niederer is an American political activist. Niederer s son was Second Lieutenant Seth Dvorin, a 24 year old U.S. Army soldier in the 10th Mountain Division. Dvorin was killed on 3 February 2004 during the occupation of Iraq. Dvorin, who …
48Tilt bridge — A tilt bridge is a type of moveable bridge which rotates about fixed endpoints rather than lifting or bending, as with a drawbridge. For this rotation to serve a useful purpose, namely facilitating boat traffic underneath, its deck must follow a… …
49Punctuation (chess) — When annotating chess games, commentators frequently use question marks and exclamation points to denote a move as bad or good. The symbols normally used are ?? , ? , ?! , !? , ! , and !! . The corresponding symbol is juxtaposed in the text… …
50Percy Sparks — Roderick Percy Sparks was a Canadian manufacturer.Born on March 7 1880 in Ottawa, Canada, on the site of where the Supreme Court stands today, Sparks was the great grandnephew of Ottawa pioneer Nicholas Sparks. Educated at the Ottawa Public… …
