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Generally speaking, servers usually have more memory than desktops and workstations.
The memory requirements of the operating systems themselves is almost always lower, so you can, for instance, run modern server software on systems that could not run a modern desktop easily (or at all). However, depending on the systems purpose and its load / traffic, the system may actually require far more memory than any desktop system.
Harddrive
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.
Most HP servers are compatible with most home computers. HP Servers are most relient with HP desktops. However, most are not found to be compatible with the HP laptops.
Linux has already surpassed all other operating systems for web servers. The growth rate for new servers is slowing, but it is still ahead of Windows servers.
The could Servers run as Operating Systems. So the OS you will instal will be the cloud OS and not a regular one.
Well, there is Linux, but nobody pays attention to Linux, Windows 7, operates on most computers like dells, Hp, and other systems, iOS 4 for apple computers, the operating system isn't that reliable, the desktops are alright to use for macs, but the laptops aren't that good. 3/5 isn't that bad
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.
A server operating system is an operating system that is designed to run on servers. Some of the operating systems include; Windows, Mac OS, and Linux.
Most Internet servers run the Linux operating system although some also run Windows Server and some may also run Unix.
Unix is targeted at both servers and workstations.