Cron can be a daemon that operates on UNIX and Linux environments that perform scheduled orders also called cron jobs developed by the crontab command. For Example, a cron job might be designed within the early days to process records every day.

Cron is most suitable for scheduling repetitive tasks. Scheduling one-time tasks is often more easily accomplished using the associated at utility.

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The computer mouse as we know it today was invented and developed by Douglas Engelbart, with the assistance of Bill English, during the 1960’s and was patented on November 17, 1970