Operating systems have many functions: A user interface is a program, or suite of programs that allows a user to interact with a computer. There are three types of interface to be considered ...

Also called an "executive" or "supervisor," an operating system performs the following functions. Job management controls the time and sequence that applications or utilities are run. For example ...

Most SAS functions are completely described in the SAS functions and CALL routines portion of SAS Language Reference: Dictionary. The functions that are described here have syntax or behavior that is ...