Computer science is a diverse topic encompassing computer technology, hardware, software, security, communications, programming, algorithms, functions, and storage. By studying it you will learn how computer science impacts on our daily lives. In this free online computer science course you will start by reviewing bits and binary code, including how they are transmitted and stored, and go all the way to computer algorithms which help solve complex problems in an efficient and cost-effective manner. You will also review various computer systems and architecture such as Linux, Windows, and Mac operating systems. This free online computer science course will be of great interest to IT professionals who would like to review the diverse range of topics found in computer science. It will also be useful to learners interested in a career in IT and computing who would like an introduction to the topic.