Variables. A variable is a symbolic name for (or reference to) information. The variable's name represents what information the variable contains. They are called variables because the represented information can change but the operations on the variable remain the same. In general, a program should be written with Symbolic notation, such that a statement is always true symbolically.
Definition of overwatch. 1  1 archaic : to weary or exhaust by keeping awake. 2  2a obsolete : to watch through or throughout (as the night) b : to watch over. 3  3 : to support by fire another element which is moving tanks overwatching an assault battalion.
Stop Afib. Watchman Device as Alternative to Warfarin or Coumadin. The results of the Watchman device trial, called PROTECT-AF, have just come out of the American College of Cardiology 2009 annual meetings in Orlando. The Watchman (Atritech) is a device that closes off the left atrial appendage (LAA) to minimize the risk of stroke.