| Operation EmeryOperation Emery was a series of twelve nuclear tests conducted at the Nevada Test Site. These explosions occurred after the Mandrel series and before Grommet. The ‘’’Baneberry’’ blast was notable for the three million curies of radiation that escaped thro | Open system (system theory)An open system is one whose border is permeable to energy (or mass) as distinct from a closed system in which the border is not permeable. Note that the definition of a " system" is arbitrary; a system is simply a collection of components (that have eleme | Optical telescopeAn optical telescope is a telescope which is used to gather, and focus, light, for directly viewing a magnified image, making a photograph, etc. The term is used especially for a monocular with static mounting for observing the sky. Handheld binoculars ar |
| Operation HiramOperation Hiram was a military operation conducted by the Israel Defence Force (IDF) during the 1948 Arab-Israeli War It was led by Moshe Carmel and aimed at capturing the entire Galilee region for Israel. The operation, which lasted just 60 hours ( Octob | Operation NachshonThe objective of Operation Nachshon (or Nahshon , an Israeli military operation in the 1948 Arab-Israeli war, was to open up the Jerusalem road that had been besieged by the Arabs. It was named after the Biblical figure Nachshon Ben Aminadav who was the f | Operation GranbyThe British named their particaption in the 1991 defense of Saudi Arabia (know to the Americans as Operation Desert Shield) Operation Granby. The name also applied to the liberation of Kuwait (the American Operation Desert Storm). Named after the British |
| Operational semanticsIn computer science, operational semantics is a way to give meaning to computer programs in a mathematically rigorous way (see semantics of programming languages). The operational semantics for a programming language describe how a valid program is interp | Operation WeserübungOperation Weserubung was the German codename for Nazi Germany's assault on Scandinavia during World War II. The name translates as "Weser Exercise", the Weser being a German river. On the early morning of 9 April, 1940 Wesertag ("Weser Day") — Germany inv | OppositionOpposition may refer to a number of topics: Astronomical opposition Parliamentary Opposition. |
