1. command line interface a user interface in which you type commands instead of choosing them from a menu or selecting an icon
  2. community service a service that is performed for the benefit of the public or its institutions
  3. community of interests agreement as to goals
  4. community center a center where the members of a community can gather for social or cultural activities
  5. common denominator an integer that is a common multiple of the denominators of two or more fractions
  6. graphical user interface a user interface based on graphics instead of text
  7. commanding officer an officer in command of a military unit
  8. parallel interface an interface between a computer and a printer where the computer sends multiple bits of information to the printer simultaneously
  9. command language a source language consisting of procedural operators that invoke functions to be executed
  10. commander in chief the highest officer in charge of the armed forces
  11. command line commands that a user types in order to run an application
  12. communications intelligence technical and intelligence information derived from foreign communications by other than the intended recipients
  13. oil-water interface an interface forming the boundary between the non-miscible liquids oil and water
  14. commandment an order or strict rule imposed by an authority
  15. command guidance a method of controlling the flight of a missile by commands originating from the ground or from another missile
  16. commissioned military officer a commissioned officer in the Army or Air Force or Marine Corps
  17. commandant an officer in charge of a military unit
  18. bounded interval an interval that includes its endpoints
  19. lunitidal interval interval between the moon's transit of a particular meridian and the next high tide at that meridian
  20. command sergeant major a noncommissioned officer serving as chief administrative officer of a headquarters unit of the Army