Siting next to your child while he or she peruses the Internet, you can guide him or her to make safe and intelligent decisions. You can approve websites and bookmark them together. You can monitor the conversations your children have with their friends and teach them appropriate online behavior at the same time. Or maybe that cool new programming language you've been dying to try requires more memory than what your computer currently has. Unless the activities on your computer are restricted to pure textual output (plain text files), your computer is going to get filled with a lot of "stuff" - stuff that can overfill a PC's capacity too much for the computer to function well. Although those better-known brands may be a tad bit more expensive, the computer novice will appreciate the comfort in purchasing a computer from a business that has a long record of building quality products, and that has the funds available for fulfilling returns, trades, servicing, and warranties. All the drivers of a program are stored onto the computer and used whenever a program is started. Apple's Macintosh computer was among the first of a couple systems to establish a user-to-hardware relationship through a user-friendly interface. Today, we have quite a few operating systems. Some of the more popular ones are Windows Vista, Mac OS X, ZETA, IBM, Unix, and Linux. Kids will enjoy the ability to play multi-player games and adults will enjoy the ability to blast a single message to everyone at once or maintain a group schedule. Since we're describing a home network that will connect to the Internet, you're strongly advised to install a protective firewall program to thwart Internet viruses, worms, or other damaging spyware code. The keyboard and mouse controls give users the option of speeding up or slowing down the movements of both of these peripherals. For those entering the United States from a foreign country, users will appreciate how Windows grants use of keyboard layouts native to their original language. Other uses will appreciate the different selection of cursors and the ability to add additional ones.