Source : WordNet®

beep
     n : a short high tone produced as a signal or warning [syn: {bleep}]
     v 1: make a loud noise; "The horns of the taxis blared" [syn: {honk},
           {blare}, {claxon}, {toot}]
     2: call, summon, or alert with a beeper

Source : Free On-Line Dictionary of Computing

beep
     
        {bell}