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Digital Communication Systems Comp. 1.02 Functions of the Operating System What is software? • A program that tells the computer what to do. • There are two (2) categories of software: – Operating system software, sometimes just called system software – Application software What does the operating system do? • Manages the main memory or RAM • Configures and controls peripheral devices – Peripheral devices – things attached to computer • Manages essential file operations – Formatting disks – Copying, renaming and deleting files What else does the operating system do? • Monitors system performance • Provides a user interface such as a graphical user interface (GUI) • Can multitask! – Run two or more applications at one time Other Tasks or Functions of the System Software or Operating System • • • • Controls the operation of a computer Is the BOSS of the computer system Boots the computer – turns it on Formats disks Other Tasks or Functions of the System Software or Operating System • Allows you to create folders or directories • Saves and retrieves files • Moves and copies files Specific Types of System Software • Many types designed for certain types of computers: • Used in this classroom – Windows XP • Previous versions of Windows: – Windows 2000 – Windows 98 Specific Types of System Software • DOS based operating systems (CLI) – MS-DOS (Microsoft Disk Operating System) • Macintosh Computers – OS 8, OS 9, OS 10