The operating system (OS) can be considered as the most important program that runs on a computer. Every
general-purpose computer must have an operating system to provide a software platform on top of which other
programs (the application software) can run. It is also the main control program of a computer that schedules
tasks, manages storage, and handles communication with peripherals. The central module of an operating
system is the 'kernel'. It is the part of the operating system that loads first, and it remains in main memory.
Because it stays in memory, it is important for the kernel to be as small as possible while still providing all the
essential services required by other parts of the operating system and applications. Typically, the kernel is
responsible for memory management, process and task management, and disk management.
In general an application software must be written to run on top of a particular operating system. Your choice of
operating system, therefore, determines to a great extent the applications you can run. For PCs, the most
popular operating systems are Windows 95/98, MS-DOS (Microsoft-Disk Operating System), OS/2, but others
are available, such as Linux, BeOs. In this article, explains the operating system clearly and easy to understand to the reader. (http://www.cs.cmu.edu/~fgandon/documents/lecture/uk1999/operating_system/operating_system.pdf)
2. The two reason why regional bank buy six server computers than one supercomputer:
- Because six server computers can store more data than one supercomputer.
- Six server computers are easy to manage and use.