This all sounds fine and dandy of course, but if you're not computer savvy, you're going to feel a little lost once the choice has past and the revolution is 100% complete. Fortunately, computer systems are designed in a way that even a child can manipulate them. In fact, if you can remember that most systems are designed along the line of menus and the selections of a few options on these menus, you'll do just fine no matter how many buttons there are to push. mp3 - This extension indicates a sound file that authentically reproduces voice and/or music. Windows Media Player will open and run this kind of file. .scr - This extension indicates a screen saver file. .sit - This extension indicates a Macintosh archive StuffIt file. They will not open on a Windows system without a special utility. Clicking an icon will open a tool or process a command that might also exist on a program's menu bar. Problems in this part of an interface are uncommon, however if you find yourself repeatedly clicking an icon with no results, you can correctly describe the problem by referring to the toolbar. Minimize, Restore, and Exit buttons - these three buttons are usually located on the right-most upper part of a program's interface and each allow you to minimize a program's screen, restore it to its original size, or shut down the program completely. Assuming that a computer is set up to operate on touch command - the answer is again, yes! Touch command software allows users to literally touch objects on a monitor and tell the computer what to do with a finger. Known as "kiosks," these programs are already in use world wide at ATM machines, employment centers, and in health monitoring systems. As another alternative to selling that machine, we suggest that people disconnect it from the Internet and use it to store personal documents, records, or files. This way, personal data (such as bank statements, store receipts, health records, etc.) is protected from prying viruses or hackers, while the newer machine is used to surf the net. Those who've purchased and used a computer in the past already have an idea of what they need in a new computer. But those who are new to the computer world could get lost in the myriad of choices available. The short answer to "What should I buy?" is "The best." Of course that answer is extremely subjective because "the best" to one person is certainly different to another.