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.
Absolutely. Linux will work fine on an Apple Mac PC. Linux can also be used for a selection of other computer brands.
No, u can use any computer with iTunes on. (that means a PC or Linux too)
TCP/IP
Gamesalad?
Well if u have any of the apple products u can either download iMovie
If that company was Apple or Microsoft, using Linux instead would be a bit bad for business.
Linux is licensed under the GPL. This means that if you use the kernel in one of your products, you must release any changes that you made. You can use proprietary modules, but these are restricted in what they are allowed to do. Only freely licensed modules can access all features of the kernel.
Go to the apple menu, choose about this mac, the version is listed under the apple logo.
To lock their customers into Apple's proprietary products.
Yes, cloud computing exists for Linux users. You can use almost any of the platforms with Linux.
Apple OS is originally derived from a BSD-Unix version. Apple dit never "invented" an Operating System. Apple OS is very much the same layout as many Linux distributions (or vice-versa)... OK, I think about 4% of (classical) computer users use Apple OS. About 70% use Windows, the rest are various systems, where over half of it (12%) are Linux distributions. Yes, Linux is growing, and faster than most people think. In the tablet and smartphone market, Apple once had about 100%, but since Google Android (= Linux), their share has dropped under the 40% in number of users. And it wil drop even more, as soon as Microsoft will appear.
The question is unclear. Assuming you are asking usages of linux, well people use it for personal computing. Most of the companies use linux for servers. A Linux based system is free for anyone to use. A linux system distribution can be used in the same way as windows. Almost any application for windows has an equivalent application available for linux that does the same job. Linux has word processing, picture, sound and video edotors as well as their file format converters. It can be used to play many games, play song, watch videos. Linux is available for almost any personal computer available and almost any other computer in use. Most commercial network routers and firewalls are based on linux.