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Chapter 11. Working with Applications > Running TSRs in Windows NT Workstation

Running TSRs in Windows NT Workstation

Applications you run in Windows NT Workstation may be dependent on another program being present in memory. This means that to run a particular application, another program must be run first. That initial program loads certain instructions and data required by the main application into the memory of the computer. Windows NT Workstation supports the use of the memory-resident programs, which are also known as TSRs (for terminate-and-stay-resident). When you launch these applications, typically you see a message on-screen, and then the application seems to complete because the command prompt appears. The reason for this behavior is the design of the program. The program has run, but it is now present in memory, ready for use.

There are two general uses for a TSR in memory. An application may require the TSR to be present, so you must run the TSR before launching the application. Another use for a TSR is as a pop-up program. You may have a favorite calculator, address program, or calendar application that sits in memory until you press the correct key combination, at which time the program pops up on-screen.


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