Operating System

An operating system is a program that facilitates the operation of a computer. It provides a platform which relieves other programs of the burden of communicating directly with computer hardware, and an interface that allows the user to interact with the hardware and to run other programs.

Common Operating System Families

Unix
Microsoft Windows

Tcl has been ported to many systems in these families.

Standards

Filesystem Hierarchy Standard
POSIX
a standard specification for Unix-like operating systems

Features

processes