Callback may refer to: * Callback (comedy), a joke which refers to one previously told *

Callback (computer programming) In computer programming, a callback or callback function is any reference to executable code that is passed as an argument to another piece of code; that code is expected to ''call back'' (execute) the callback function as part of its job. This ...

, callable (i.e. function) that is passed as data and expected to be called by another callable. *

Callback (telecommunications) In telecommunications, a callback or call-back occurs when the originator of a call is immediately called back in a second call as a response. International calling A callback, in this sense is a method of making low-cost international calls via ...

, the telecommunications event that occurs when the originator of a call is immediately called back in a second call as a response *

Callback verification Callback verification, also known as callout verification or Sender Address Verification, is a technique used by SMTP software in order to validate e-mail addresses. The most common target of verification is the sender address from the message en ...

, a method for e-mail address verification used in SMTP *

Web callback Web callback is a technology where a person can enter his or her telephone number in a form on a web site. The company who owns that Web site will then receive the Web callback request and a call center agent will call the person who made the req ...

, a technology that provides telephone callback for websites * "

The Callback "The Callback" is the second episode of the American television series '' Smash''. The episode aired on February 13, 2012. It was written by series creator Theresa Rebeck and directed by Michael Mayer, who also directed the pilot. Plot As Ivy Ly ...

", an episode of the TV series ''Smash'' * Callback, in the performing arts, a stage of the audition process

See also