PART A: Two of the most popular operating systems are MS Windows and UNIX. If you want in your outline you can choose the Mac OS instead of Unix. In about two pages, give an outline of each of them. Emphasize on the main characteristics and the features and advances of the most important versions.

PART B: (about one page) Give the characteristics of the Androids operating system. Give the characteristics of the I-phone operating system. If possible, compare them.