Virtually everything we do involves information and communication technologies (ICTs) – from booking tickets online and emailing friends to paying by credit card and using household appliances. At the heart of ICTs are computers – ranging from microprocessors in mobile phones, through personal computers, to large internet servers and mainframes. Most of us simply take these technologies for granted, yet understanding how they work is fascinating. Whether you simply have an enquiring mind or want to learn more about this fast-growing field in order to change career direction or improve your prospects, the OU offers a wide range of courses.