Selective Door Operation — (or SDO) is a mechanism employed primarily on trains (although buses with multiple doors also generally have this feature) that allows the driver or conductor/guard to open the electronic doors of a train separately. Purposes of SDO… … Wikipedia
Selective assassination — is a policy of selecting targets, using arms, training personnel and cover up strategies designed to justify assassination as the means to meet a political agenda.Assassination has long been a weapon in asymmetric warfare and has been favored by… … Wikipedia
Selective catalytic reduction — (SCR) is a means of converting nitrogen oxides, also referred to as chem|NO|x with the aid of a catalyst into diatomic nitrogen, chem|N|2, and water, chem|H|2|O. A gaseous reductant, typically anhydrous ammonia, aqueous ammonia or urea, is added… … Wikipedia
Operation Rolling Thunder — Part of the Vietnam War F 105 Thunderchiefs radar bombing at direction of a B 6 … Wikipedia
Operation Mole Cricket 19 — Part of the 1982 Lebanon War … Wikipedia
Operation Hiram — Part of 1948 Arab Israeli War IDF soldiers in Sa sa , 30 October 1948 … Wikipedia
Operation Breadbasket — was an organization dedicated to improving the economic conditions of black communities across the United States of America. Operation Breadbasket was founded as a department of the Southern Christian Leadership Conference (SCLC) in 1962, and was … Wikipedia
Operation Top Hat — was a local field exercise [1] conducted by the United States Army Chemical Corps in 1953. The exercise involved the use of Chemical Corps personnel to test biological and chemical warfare decontamination methods. These personnel were… … Wikipedia
Selective Service System — Agency overview Formed May 18, 1917 September 16, 1940 Headquarters Arlington County, Virginia, United States … Wikipedia
Selective calling — SECAL redirects here. For the French wine grape also known as Secal, see Jurançon (grape). In a conventional, analog two way radio system, a standard radio has noise squelch or carrier squelch which allows a radio to receive all transmissions.… … Wikipedia