1. Mac OS X
1.1. Pros:
1.1.1. applications written in Java fit as neatly into the operating system as possible while still being cross-platform compatible,
1.1.2. It is the most successful Unix-like desktop operating system on the web, estimated at over 5 times the usage of Linux (which has 1.5%).
1.2. Cons:
1.2.1. Less hardware choices than Windows
1.2.2. More complex than Windows due to its UNIX base
1.3. http://on.mash.to/nSbDHA
1.4. http://yhoo.it/nn1uzf
2. Windows 8
2.1. Pros:
2.1.1. Fast launching of apps from a tile-based Start screen
2.1.2. Convenient ability to snap and resize an app to the side of the screen, so you can really multitask using the capabilities of Windows.
2.2. Cons:
2.2.1. No updating third-party software via Windows Update in the upcoming Windows 8.
2.2.2. The start menu offers just four options, and not the full list of applications and menus familiar to Windows users.
2.3. http://bit.ly/w54VEp
2.4. http://bit.ly/qHl1b8
2.5. http://bit.ly/uW427O
3. Windows 7
3.1. Pros:
3.1.1. Windows 7 has key performance improvements to take up less memory and run background services only when you need them.
3.1.2. Use your fingers to browse the web, flip through photos, and open files and folders on a touchscreen PC—for the first time, Windows includes true multitouch technology.
3.2. Cons:
3.2.1. More expensive than other operating systems
3.2.2. Some of the features like Start Menu user interface, Windows Ultimate Extras, InkBall, Windows Photo Gallery, Windows Movie Maker, Windows Calendar Windows Mail called Windows Live Essentials were included in Vista are removed in Windows 7.
3.2.3. http://bit.ly/pR459B
4. Ubuntu 11.04
4.1. Pros:
4.1.1. easier file management, new dashboard for easier access to your applications and files, and Workspaces that simplify managing multiple windows.
4.1.2. won’t miss are the millions of viruses and worms that attack Windows machines
4.2. Cons:
4.2.1. No Speech recognition
4.2.2. It lags behind Mac and Windows.
4.3. http://bit.ly/oM5E79
4.4. http://on.mash.to/nSbDHA
5. Linux
5.1. Pros:
5.1.1. Fee Operating system that gets updated regularily.
5.1.2. Open Source
5.2. Cons:
5.2.1. Many versions exist in the market
5.2.2. Must have back up for files