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Software Basics

  An operating system is a large program. This chapter introduces basic software principles and gives an overview of the aims and functions of an operating system.

A set of computer instructions that perform a particular task is a program. That program can be written in assembler, a very low level computer language, or in a high level, machine independent language such as the C programming language. An operating system is a set of software which allows the user to run application software.

David A. Rusling