Why are computers used? Why have they become so popular? These questions can be answered by examining the characteristics of a computer, which include its tremendous speed, accuracy, capacity, durability and reliability, versatility, cost-effectiveness, and technical growth. Computer systems work together in a network. This unit will cover the basic computer system, what makes a computer work, and Networking.

Over the past several decades personal computers (PCs) have evolved at an astonishing rate. Machines that once required a warehouse to maintain can now fit in the palm of the user's hand. Not only are they smaller, but a typical PC is exponentially more powerful than a model released only a few years before. Modern computers house a variety of parts that work together to create a stable and effective tool. The constantly evolving hardware can make computer education a foreboding task, but some basic concepts are used continuously to make a PC work.

The internet has become a cultural, economical and life changing technological phenomenon. Enough cannot be said about this incredible technology. However, the internet is not one single invention; it is a simple idea that has evolved throughout the decades into something bigger than us all. This unit covers the history of the internet and some important areas of discussion of the internet today.