1. Mac OS X
1.1. Pros:
1.1.1. Very fast boot time!
1.1.2. The Universal menu bar
1.2. Cons:
1.2.1. Updates are released in large patches instead of little bits being released
1.2.2. Very difficult to install on your own
2. Google Chrome OS
2.1. Pros:
2.1.1. Aimed for people that spend most of their computer time on the internet
2.1.2. Hardened security will reduce malware exposure
2.2. Cons:
2.2.1. Cant be installed or downloaded since it comes only on specific google hardware
2.2.2. Not for PC's, but for netbooks and smaller devices
3. software that controls the execution of computer programs
4. Windows 7
4.1. Pros:
4.1.1. Very easy to install
4.1.2. The Windows 7 Task bar is a great new add on
4.2. Cons:
4.2.1. It’s up to each application to inform you of an update, or you to find one yourself
4.2.2. New software costs money,often microsoft expects you to pay for simple software
5. Ubuntu 10.10
5.1. Pros:
5.1.1. Very easy to install
5.1.2. All updates are available right after dicovery
5.2. Cons:
5.2.1. When installing it does not give adobe flash or and mp3 player default.
5.2.2. Security updates are not released on a regular schedule