1. Windows 7
1.1. Pros:
1.1.1. Easy to use
1.1.2. Most popular
1.1.3. Applications and driver support
1.2. Cons:
1.2.1. Spywares and viruses are targeted to this plataform
1.2.2. Not free
1.2.3. Not very secure
1.2.4. http://blog.hafees.com/windows/windows-linux-and-mac-a-comparison/
2. Linux: Ubuntu
2.1. Pros
2.1.1. Free software and open source.
2.1.2. multimedia, web server, music creation.
2.1.3. Community Support
2.2. Cons
2.2.1. Unstable, many crashes
2.2.2. Lack of high quality professional software
2.2.3. Hardware not standard
2.3. http://blog.hafees.com/windows/windows-linux-and-mac-a-comparison/
3. OS Definition
3.1. What is an operating systems?
3.1.1. An Operating System is a computer program that manages theresources of a computer. It accepts keyboard or mouse inputs fromusers and displays the results of the actions and allows the user to runapplications, or communicate with other computers via networked connections.
3.1.2. http://cplus.about.com/od/introductiontoprogramming/g/opsystemdef.htm
4. Google: Chromium
4.1. Pros:
4.1.1. Speed
4.1.2. Simplicity
4.2. Cons:
4.2.1. It is "Cloud computing based" and can be "claustrophobic"
4.2.2. Will run only on specifically designed hardware
4.2.3. http://en.wikipedia.org/wiki/Google_Chrome_OS
4.2.4. http://googleblog.blogspot.com/2009/07/introducing-google-chrome-os.html
5. Apple OS X
5.1. Pros:
5.1.1. A large number of excellent professional applications
5.1.2. Targeted less by viruses & spywares
5.2. Cons:
5.2.1. Cost of ownership is high
5.2.2. Not the most straightforward installation