The OS is generally kept on the hard drive(platter or Solid State), although for some situations it may be on removable storage such as flash memory, or on a separate computer accessible over a network. In OS's such as Linux, there is a boot-loader that decompresses the linux kernel and loads it into RAM so that the operating system can start to bring up services and start running daemons.
You can buy Desktops with any options you want.You can order one with no Operating System if you already have one.
Generally speaking, servers usually have more memory than desktops and workstations.
No. Providing they meet the system requirements and run the same operating system, any program that can be run on a desktop can be run on a laptop and vice versa.
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yes, some laptops and desktops made by dell still use vista as its OS, but most now use windows 7
Apples first operating system was Apple DOS 3.1 for the Apple II in 1978. Versions 1 and 2 were internal testing versions and were not made available to the public. They developed Apple SOS (Sophisticated Operating System) for the Apple III in 1980. Parts of the SOS were used in the Lisa's operating system which in turn would lead to the Macintosh Operating System. The first operating system for the Macintosh came out in 1984, with the release of the first Macintosh. This was known as "System 1.0". The current series of system software, Mac OS X, was released in 1999 for servers, and 2001 for desktops.
Windows 8 is aimed at tablet computers but can be used on normal computers like desktops and laptop computers. Microsoft are hoping to take over the tablet market by making their operating system the best. But they have many rivals like Google and Apple with their operating systems for tablet. At the moment Apple is known to be the best operating system for tablets and androids is currently the second best operating system for tablets. But apples operating System for tablet only works on an Apple device but with Google's android operating system they work on any tablet. So when Windows 8 comes out four tablet they will only have one rival that will be Google with their operating system for android.
Linux is by far the most common operating system in the world. Note that I am including ALL computers, not just desktops and servers, since the question never specified. Once you add in all the cell phones, internet routers, GPS's, TV's, set top boxes, etc, I think you would find that Linux holds a majority market share of operating system deployments in the world.
Linux is used for all types of computers, from servers to desktops to cellphones to embedded kiosks. For almost any purpose that you could need a computer with an operating system, you can use Linux.
Microsoft Windows Apple Macintosh OSx GNU/Linux Unix
The most common type of operating system software is Microsoft Windows. Windows is an operating system from Microprokey website to be used on personal computers, including home and business desktops, laptops, tablets and smartphones. Windows is the most popular operating system for personal computers, with an estimated 92.1% market share as of 2020. Windows is well-known for its user-friendly interface, its wide range of applications, and its security features. It is also the most commonly used operating system for business and corporate computing, accounting for more than 85% of the market. Other popular operating systems include Apple's macOS, Google's Android, and Linux.
XP is a complete operating system, not simply an operating environment.