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System software- Consists of the programs that control or maintain the operation of the computer and its devices.
Operating systems- is a set of programs containing instructions that work together to coordinate all the activities among computer and mobile device hard ware.
Start and shut down a computer or mobile device- If a computer or mobile device is off, you press a power button to turn it on.
Provide a user interface
Manage programs
Manage memory
Coordinate tasks
Configure devices
Establish an Internet connection
Monitor performance
Provide file management and other device or media related tasks
Updating operating system software
Control a network
Administer security
Booting Process
Karnel- the core of an OS that manages memory and device maintains the computer’s clock, start programs and assigns the computer resources.
Memory resident- it remains in memory while the computer is running.
BIOS (basic input/output system)- Firmware that contains the computer’s start up instructions.
Pwer-on self test(Post)- The tests that check the various system components.
Make sure the computer hardware is connected properly and operationg correctly.
CMOS Chip- Stores configuration information about the computers such as the amount of memory; type of disk drives, keyboard, and monitor , the current date and time; a other startup information.
Operating System Functions
A boot drive is the drive from which your computer starts
You can boot from a boot disk
A recovery disk contains a few system files that will start the computer
Includes various power options
Sleep mode saves any open documents running programs or apps to memory, turns off all unneeded functions, and then places the computer in a low-power state.
Hibernate saves any open documents and running programs or apps to an internal hard drive before removing power from the computer or device.
A user interface(UI) controls how you enter data and instructions and how information is