An escape sequence is a series of characters used to change the state of computers and their attached peripheral devices. These are also known as control sequences, reflecting their use in device control. Some control sequences are special characters that always have the same meaning. Escape sequences use an escape character to change the meaning of the characters which follow it, meaning that the characters can be interpreted as a command to be executed rather than as data.

Escape sequences are commonly used when a computer and a peripheral have only a single channel through which to send information back and forth. If the device in question is "dumb" and can only do one thing with the information being sent to it (for instance, print it) then there is no need for an escape sequence. However most devices have more than one capability, and thus need some way to distinguish information that is to be treated as data from information that is to be treated as commands.

An escape character is usually assigned to the Esc key on a computer keyboard, and can be sent in other ways than as part of an escape sequence. For example, the Esc key may be used as an input character in editors such as EMACS, or for backing up one level in a menu in some applications. The Hewlett Packard HP 2640 terminals had a key for a "display functions" mode which would display graphics for all control characters, including Esc, to aid in debugging applications.

Hans Florian Zimmer, German pronunciation: [hans ˈfloːʁi̯aːn ˈtsɪmɐ]; (born 12 September 1957) is a German film composer and music producer. He has composed music for over 100 films, including award winning film scores for The Lion King (1994), Crimson Tide (1995), Gladiator (2000), The Last Samurai (2003),The Dark Knight (2008), and Inception (2010).

Zimmer spent the early part of his career in the United Kingdom before moving to the United States. He is the head of the film music division at DreamWorks studios, and works with other composers through the company which he founded, Remote Control Productions.

Zimmer's works are notable for integrating electronic music sounds with traditional orchestral arrangements. He has received four Grammy Awards, two Golden Globes, a Classical BRIT Award, and an Academy Award. He was also named on the list of Top 100 Living Geniuses, published by The Daily Telegraph.

Zimmer was born in Frankfurt am Main, Germany. As a young child, he lived in Königstein-Falkenstein, where he played the piano at home, but had piano lessons only briefly as he disliked the discipline of formal lessons. He moved to London as a teenager, where he attended Hurtwood House school. In an interview with the German television station ZDF in 2006, he commented: "My father died when I was just a child, and I escaped somehow into the music and music has been my best friend."