The computer's master control program. When a computer is turned on, a small "boot program" loads the operating system. Although additional system modules may be loaded as needed, the main part, known ...

The Operating System is a base infrastructure software component of a computerized system. It controls all basic operations of the computer (or other electronic devices such as PDA, smartphone, etc.).

Almost all x86-based PCs use the Windows operating system, which began to flourish with Windows 3.1 in 1992. Today, 16-bit Windows 3.1 and 16-bit DOS applications are still running on 32-bit versions ...