TSR

Abbreviation of terminate and stay resident. Refers to DOS programs that can be memory resident (remaining in memory at all times once they are loaded). Calendars, calculators, spell checkers, thesauruses, and notepads are often set up as TSRs so that you can instantly access them from within another program. TSRs are sometimes called pop-up programs because they can pop up in applications.

When you install a TSR, you define a special key sequence (usually a control character) that will invoke the TSR program. You can then press this hot key from within any application to run the TSR program. Many programs can be installed as a TSR, but TSRs reduce the amount of memory available to other programs. In addition, not all TSRs interact well with each other. You may have difficulties, therefore, if you try to keep too many TSRs in main memoryat once.

TSRs are unnecessary with multitasking operating systems such as Windows, OS/2, and the Mac OS.

Webopedia Staff
Webopedia Staff
Since 1995, more than 100 tech experts and researchers have kept Webopedia’s definitions, articles, and study guides up to date. For more information on current editorial staff, please visit our About page.

Related Articles

Product Manager

A product manager is someone involved in all areas of production, including setting strategies; developing products; and working with relevant project team members, such...

Kintone

Companies looking for a business process management or customer relationship management (CRM) tool may wonder if Kintone is the right choice. In this Kintone...

Special Character

A special character is one that is not considered a number or letter. Symbols, accent marks, and punctuation marks are considered special characters. Similarly,...

HR Recruitment Software

HR recruitment software helps organizations find, recruit and hire the best job candidates.

Product Manager

A product manager is someone involved in all areas of production, including setting...

Kintone

Companies looking for a business process management or customer relationship management (CRM) tool...

Geotargeting

Geotargeting is a method of delivering data or content to users based on...