Operating systems are pieces of software that control the processes within a computer
Operating systems have many different functions:
Manage memory usage
Control the CPU
Manage and prioritise tasks
Monitoring inputs and outputs
Receive data from storage devices
Manage printing
Operating systems can be single user or multi user:
Single user is an OS where only one user can access the computer system at a time
Multi user is an OS that allows more than one user to access the computer system at a time
Operating systems can use a single processor or multiple processors:
Single processor contains only one processor in the system. Tasks will be allocated to a single processor and the CPU will get shared between users
Multi processor contains two or more processors in a system. Tasks will be allocated to multiple different processers. In a multi-user system, each user can use a different processor resulting in better performance
Operating systems can be off the shelf, open source or bespoke:
Off the shelf operating system is a ready-made OS that has full functionality upon download
Open-source operating system is an OS that can be edited with the source code available to view and edit. This means the OS can be adapted by the company to it can align with their needs
Bespoke operating system is an OS that has been specially made in order to fit the client’s needs
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