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(1) A software product designed to help a group of colleagues schedule meetings and other appointments. The scheduler program allows members of a group to view each others' calendars so that they can choose a convenient time. Once a time has been selected, the scheduler can automatically send out reminders through e-mail and can even reserve resources such as conference rooms and overhead projectors.

(2) In operating systems, a scheduler is a program that coordinates the use of shared resources, such as a printer.

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