WordNet (r) 3.0 (2006):

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

The Free On-line Dictionary of Computing (19 January 2023):

bell
beep
BEL
control-G
g-bell

    ASCII 7, ASCII mnemonic "BEL", the character
   code which prodces a standard audibile warning from the
   computer or terminal.  In the teletype days it really was a
   bell, since the advent of the VDU it is more likely to be a
   sound sample (e.g. the sound of a bell) played through a
   loudspeaker.

   Also called "G-bell", because it is typed as Control-G.

   The term "beep" is preferred among some microcomputer
   hobbyists.

   Compare feep, visible bell.

   (1997-04-08)


The Jargon File (version 4.4.7, 29 Dec 2003):

beep
 n.,v.

    Syn. feep. This term is techspeak under MS-DOS/Windows and OS/2, and
    seems to be generally preferred among micro hobbyists.