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Operating Systems (OS)

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Collections of programs that tell the computer hardware what to do.

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User Interface

Back

The means of communication between the user and the computer, typically either command line or GUI.

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Command Line

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The simplest form of user interface where users type commands into a prompt.

Front

Graphical User Interface (GUI)

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Most modern computers have a GUI, which uses icons to represent programs and files. The user runs programs through a touchscreen or mouse-controlled pointer.

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Voice Command

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Users can speak commands to devices such as Google Home and Amazon Alexa.

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Memory Management

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The OS controls available memory, moving programs to and from secondary storage to RAM.

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Multitasking

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The OS alternates between programs to make it appear that multiple tasks are running simultaneously.

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Peripheral Management

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Computers communicate with external devices like printers and scanners. The OS uses drivers to ensure correct function.

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Drivers

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Software that provides communication between the CPU and a peripheral device.

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User Management

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Multiple users can have accounts on the same computer, each with their own files and settings, protected by passwords.