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There are dozens of computer operating systems available, but three of them account for 99% of all operating systems on personal computers.
Linux: market share 6%
Based on Unix it is used as the main operating system across the internet, versions of Linux run Google and most other servers. It also runs all of the worlds top 50 super computers. It has relatively low system requirements and can be free from cost, as are most of the programs that run on it. It can be installed on just about any computer including Apple Macs. Photoshop will run on Linux through Wine software but there is no version of Photoshop written for Linux.
Typical size on disk including all the programmes you need 4gb
Windows: market share 87%
The worlds most popular operating system but few regard it as the best. The system has to be paid for, as will most programs, and is vulnerable to virus attacks, so must be protected by anti virus programs which slow down the performance of the computer. Windows will run on almost all PCs including Apple Macs. Photoshop will run on Windows.
Typical size on disk including a few programmes 16gb
Apple MacOS market share 5%
Designed by Apple and installed on all Mac computers. Very similar to Linux in many respects, but not free in any sense and has relatively little program support for third party software. Although MacOS will run on any PC, Apple have sort to prevent this by installing a chip on Mac computer motherboards which is needed by the OS to install. Photoshop will run on Mac.
Typical size on disk including a few programmes 20gb
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