The buttons on these main menus of course take you to additional menus, which in turn give you even more choices to make. And all of those choices will eventually bring you to the service that you need. One very important choice you'll want to keep your eye on is the option to return to the main menu. As we mentioned earlier, you can use a programming language to control your computer. By using simple commands, you can program your computer to perform mathematical tasks, fill out web forms, compose an email message and send it off, or any number of other things. If you're interested, you may find Visual Basic is one of the most easiest programming languages to learn. If you have a small collection of computers around the house (and a small collection of computer users), you can connect each one of those computers to one another and share data, software, and hardware including a single Internet connection. There are many creative uses for home networking, however it's an ideal situation when upgrading each computer to the same capability is financially out of the question. When clicked, a small "x" displays inside a box. Similar to the check box, a radio button allows a user to indicate a single choice among many. Problems with radio buttons and check boxes occur when a user makes one choice, but the interface reacts as if the user made many choices (or none at all). For the novice, it's best to buy a computer that has all of these components included so that when it's taken home, assembling the computer is a simple matter of plugging things in where they belong. Save the individual purchases of these components for those who have more experience. 2. Decide what you'll use the computer for. This is a common occurrence when newer pieces of hardware require the programming of a newer operating system. Sure, one could upgrade the operating system to accommodate the demands of a new piece of hardware, but trouble starts when that new operating system requires new hardware in return. If we're not careful, we could end up replacing almost every hard and soft part of a computer that we own - all in an effort to upgrade!