At (command)
at is a shell command for scheduling commands to be executed once, at a future time. The command was originally developed for use with Unix and is now available on a variety of Unix-like systems, as well as Windows, and ReactOS. == Variants == === Unix-like === On Unix-like operating systems, at reads a series of commands from standard input and collects them into one "at-job" which is carried out at a date and time that is specified as part of the command.