Operating Systems

1. Linux:Open Source,Free

1.1. Pros:

1.2. Cons:

2. What % use windows?

2.1. Focus in Windows 7

2.2. 90%

2.3. Pros:

2.4. Cons:

3. Apple:OSX,Leopard

3.1. Pros:

3.2. Cons:

4. –noun Computers. the collection of software that directs a computer's operations, controlling and scheduling the execution of other programs, and managing storage, input/output, and communication resources.

5. Cellphone Operating Systems

5.1. 1. iPhone 2. Android 3. BlackBerry 4. Windows Mobile

5.2. Which one do I have?