1. Window 7
1.1. Pros:
1.1.1. easy to install the disk for the beginners
1.1.2. has a new taskbar
1.2. Cons:
1.2.1. takes more time for Microsoft to fix the flaw when it has been found
1.2.2. need more time to search for the application software you want to install
2. Mac OS X
2.1. Pros:
2.1.1. great use of disk cache, and speeds up boot 17/20
2.1.2. has useful menus on the top and easy access application at the bottom dock
2.2. Cons:
2.2.1. still vulnerable to attack
2.2.2. if the installer falls, it's not easy to fix it by beginners
3. Operating System Definition
3.1. is an software, consisting of programs and data, that runs on computers and manages the computer hardware and provides common services for efficient execution of various application software
4. Ubuntu 10.10
4.1. Pros:
4.1.1. almost all of the application softwares are available in ubuntu's software center
4.1.2. with the software center, easy update software and security
4.2. Cons:
4.2.1. can't play music or youtube if you install defaulted options
4.2.2. may not attract some experienced Linux users who prefer other distributions
5. Chromium OS
5.1. Pros:
5.1.1. has nice design and very speedy boot 16/20
5.1.2. consumes one-sixtieth as much drive space as Windows 7
5.2. Cons:
5.2.1. hard for Web applications to handle specific link types
5.2.2. not be available as a download to run and install.