# Introduction

In this session, you will explore how a processor is given instructions to perform a defined function. The instructions are known as software. There are two broad classes of software: operating systems and applications, though these can be called by different names. You will be introduced to one technique that is used to organise the instructions for a computer to understand. Finally, you will look at some special purpose instructions targeted at web browsers, which will lead into the next session on the Internet.

OpenLearn - An introduction to computers and computer systems
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