What is terminate and stay resident (TSR)? - Definition from Whatis.com

Definition

terminate and stay resident (TSR)

A terminate and stay resident (TSR) program is one that is set up to be loaded and then remain in computer memory so that it is quickly accessible when a user presses a certain keyboard combination. TSR programs are used in Disk Operating Systems and perhaps other non-task operating systems. They aren't needed in multitasking systems such as Windows and OS/2. TSR programs typically include calculators, clocks, and notepads. When running another program in DOS, you can press the preset keyboard key or combination of keys and the TSR program will "pop up" into view.

Contributor(s): Ranjeet Walunj
This was last updated in November 1999

Dig Deeper

  • Remote backup can ease network disaster recovery

    Backing up to local disk or tape can protect against the accidental destruction of a file but will do nothing to protect you when your facility suffers fire or flooding. Remote backup provides a better solution. This tip looks at two possibilities for remote backup: Choosing an outsourced remote backup service, or using software to do your own backups to an offsite facility.

  • VoIP now part of phishing attacks

    Learn how attackers are using the widespread deployment of low-cost VoIP to leverage phishing attacks.

  • VoIP privacy on the WAN

    Is the government listening to your VoIP traffic? Can other companies spy on your WAN? It may sound like a paranoid conspiracy theory, but it's not that far out, technologically speaking. In this tip, Tom Lancaster looks at just how exposed your WAN traffic may be.

Do you have something to add to this definition? Let us know.

Send your comments to techterms@whatis.com