There are several desktop environments for Linux currently in use. The most popular are GNOME and KDE.
GNOME and KDE.
The X Windowing System is the "de facto" standard for graphical shells in Unix and Linux. Desktops use it as a client as well as all the graphical applications.
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.
Dice.com which is located in Wichita, Kansas are currently hiring people that are certificated in Linux.
No Apple products currently ship with Linux. Apple has worked on Linux in the past to create projects like MkLinux. Some projects that Apple has created, such as CUPS and Clang will run on Linux.
Computer professionals that are running a dedicated webserver use dedicated Linux servers. Linux servers are currently the most widely used server operating systems in the world.
Currently, it is not possible to use a Zune with Linux. The Zune was required to use special software to sync music to and from it, in order to ensure DRM protection. The protcol for it has not yet been completely reverse-engineered.
Linux and the many variations based on Linux (Ubuntu, Mint, to name but two) are aimed at any one who wishes to use it, and is available for free.
That would depend on what you want to protect Linux from. Ports are closed by default, so there is little need for a firewall. There are several anti-virus products available for Linux, but as there are very few Linux viruses, and no currently effective ones, they are only helpful in removing Windows viruses.
Desktops are more faster and can use allot of memory Versus laptops
No, it is unix-based but Linux is a kernel not an operating system.Ubuntu,Linux Mint,Debian,and puppy Linux,ect. are OS's that use the Linux kernel.
No. PlayStation 3s use a totally different kind of processor from those found in desktops, laptops, and most servers. The only way to run it is in an emulator on top of Linux. This runs very slowly and is not practical for any actual use.