### Clue: Missile key computer company holds (1,1,1,1)
### Answer: I.C.B.M. 
 ### Explanation: Definition: Missile
 C(one of the keys in which a musical piece may be scored) **contained in**(… holds) IBM(the computer company, from the abbrev. for "International Business Machines").
Answer: The Inter-Continental Ballistic Missile, the long range missile that proliferated during the Cold War.