Callback

4 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  call-back \call-back\ n.
     1. a return call, especially a telephone call.
        [WordNet 1.5]
  
     2. the recall of an employee to work after a layoff.
        [WordNet 1.5]



From WordNet (r) 2.0 [wn]:

  call-back
       n 1: a return call
       2: the recall of an employee after a layoff

From WordNet (r) 2.0 [wn]:

  callback
       n : a request by the manufacturer of a defective product to
           return the product (as for replacement or repair) [syn: {recall}]

From The Free On-line Dictionary of Computing (27 SEP 03) [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)