Most of us use computers every single day and rely on them for work, personal communication, shopping, entertainment and organization, but it's easy to forget all the work that's going on inside while we sit around typing away. We know what to call our computers when they fail on us and make us late for presentations, but do we know what to call their ins and outs? Take part one in my series of tech quizzes about the inner workings of your favorite machine. (Photo courtesy of the Original Macintosh User Manual)

Tech Quiz Part 1: How Well Do You Know Computers?

We'll start off easy: What is the primary input device used to enter information and instructions into the computer?