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callback
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English Dictionary: callback by the DICT Development Group
2 results for callback
From WordNet (r) 3.0 (2006) [wn]:
callback
n
  1. a request by the manufacturer of a defective product to return the product (as for replacement or repair)
    Synonym(s): recall, callback
From The Free On-line Dictionary of Computing (15Feb98) [foldoc]:
   callback
  
      1. A scheme used in {event-driven} programs
      where the program registers a {subroutine} (a "callback
      handler") to handle a certain {event}.   The program does not
      call the handler directly but when the event occurs, the
      {run-time system} calls the handler, usually passing it
      arguments to describe the event.
  
      2. A {user authentication} scheme
      used by some computers running {dial-up} services.   The user
      dials in to the computer and gives his {user name} and
      {password}.   The computer then hangs up the connection and
      uses an {auto-dial} {modem} to call back to the user's
      registered telephone number.   Thus, if an unauthorised person
      discovers a user's password, the callback will go, not to him,
      but to the owner of that login who will then know that his
      account is under attack.
  
      However, some {PABX}s can be fooled into thinking that the
      caller has hung up by sending them a dial tone.   When the
      computer tries to call out on the same line it is not actually
      dialing through to the authorised user but is still connected
      to the original caller.
  
      3. {cost control callback}.
  
      (2003-07-13)
  
  
No guarantee of accuracy or completeness!
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