Most presentations, documents and work files are created in a Microsoft program, such as Word, PowerPoint or Excel. Adobe software is also a must, with some specializing in design applications (Photoshop, InDesign, Illustrator), while others are for web design (Dreamweaver, Flash).
More than likely you are familiar with a PC, as most homes and schools use Windows-based computers. However, if you want to enter the world of computers you need to know how to use and service a Mac. Although most word processor and spreadsheet data is created on a PC, the fields of video editing, video game creation and graphic design tend to utilize Macs as they are typically less prone to crashing.
Take a course on computer networking. Most businesses and schools run on a network, so it is important to know how to run it and troubleshoot it if an issue arises. There are multiple networks you want to learn about, including LAN (local area network), WLAN (wireless local area network) and MAN (metropolitan area network) if you want to obtain a job working for a local government that has a widely utilized Internet connection.
Enroll into a class that describes the inner workings of a computer, how to install equipment and how to troubleshoot it. With this knowledge you not only can fix your home computer, but work at a local repair shop.