There are other programs that do the same thing and there are even programs that can compress and decompress files for both the Windows and the Mac system. However since Winzip and StuffIt are the most popular, we will assume you will use either one to compress and decompress your own files. If you download a compressed file from a website or file library that ends in an . 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. For example, when you're faced with an electronic system, look for a main menu. Most main menus display themselves as soon as a device is turned on, so chances are that if you're standing before a device that shows a bunch of choices to do something, you're looking at a main menu. His intentions were to disable the computers of the online service's users so much that they wouldn't be able to connect for days. In his mind, the loss of connection meant loss of revenue for the online service. Although the malicious code that this person generated may have worked for a small percentage of users, sufficed to say, the online service continued on and still exists today. sit - This extension indicates a Macintosh archive StuffIt file. They will not open on a Windows system without a special utility. .ttf - This extension indicates a font especially designed for use on a Windows system. It stands for "True Type Font." .txt - This extension indicates a plain text file that can be opened with Notepad. Decide what you'll use the computer for. If you want to use your computer for cruising the web, sending email, or performing simple word-processing or spreadsheet tasks, a computer with the basic components that we just described should suffice. If you want to use a computer to help with a career in multimedia however, you're going to need to accessorize your system with a scanner, printer, digital camera, tablet, or digicam for example. Eventually, the keyboard and mouse will have to play a role when computer newbies have to work with one as a cash register, as a hotel booking program, or as a library's catalog system. These requirements don't make computers any less easier to operate, but they don't make them that much harder either.