The operating system, or OS, performs basic tasks like running software applications, files on your hard drive, and directing peripherals like a DVD drive.
The latest Apple OS--X 10.3, or "Panther" is a cutting edge OS and boasts the world's most elegant user interface. Apple machines and their OS's have historically been preferred by graphic and sound design professionals, but now has a growing number of users among students and universities due to it's ease of use and built-in creativity.