An example of an error in this part of an interface would be if an option was missing or grayed out (lighter in color). Tool bar - this part of a program displays small icons across the top which represent tools. Clicking an icon will open a tool or process a command that might also exist on a program's menu bar. Connected to the network, each computer can send files back and forth, open programs on a remote computer, play the sound files and videos located on another computer, and share a single Internet account to browse the web, download files, or chat with someone in an entirely different country. If a single printer is available on only one computer in the network, every connected PC can send documents to it and print them out. The product crosses all demographics and thanks to decreasing costs - it sees no economic boundaries as well. The Wikipedia encyclopedia claims that "Out of 1 billion camera phones to be shipped in 2008, Smartphones, the higher end of the market with full email support, will represent about 10% of the market or about 100 million units. An operating system is a software program that controls how the computer's hardware (and installed software) works. It manages the activity of every component and then displays that activity as a user-friendly interface (GUI). It keeps track of where things exist on a computer's hard drive as well. But perhaps most importantly for the end-user, the operating system is responsible for translating commands issued with a keyboard and mouse into binary code (010110101 stuff) that can communicate with a set of speakers, a printer, a scanner, and more. Sometimes, the representatives of these companies participate, but most of the time, the support in this group is user to user, which is just as valid because you're working with a team of experienced people. 5. Support Lines. Another source for help that we shouldn't forget are the support systems of various manufacturers. Can an absolute newbie sit down at a computer without knowing how to use one? 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.