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. In a nutshell, open source software is software made by everyone - for everyone. The hopes behind its development is that through its open access, it will evolve into something that represents the true desires of computer users. Through a wide network of user involvement, the software in question is enhanced and debugged without costs or administrative politics. Earlier computers didn't have an operating system and if you have experience with the computers of the early eighties, you'll remember that most to them didn't even have a hard drive! These old computers booted an MS-DOS type operating system from drivers stored onto a floppy disk, and in order to use a program, users would remove the boot floppy and then insert a new floppy that contained the program. au - This extension indicates a sound file. Most sound players will load up and play this kind of file. .art - This extension indicates an image file that was compressed with AOL (America Online) technology. Both Internet Explorer and the AOL service software can display this kind of file, however if you don't have AOL installed on your system, Internet Explorer will display it. Conditions allow a program to perform an action based on the outcome of a previous command.3 Using this type of instruction, we could instruct a program to do one thing if the "x" variable in our latter example turned out to be 7 days, and then do different thing if the variable turned out to be 3 days. Although the prices of computers are decreasing, they can still create a hefty expense especially if you need additional peripherals described above. In addition, you'll need to figure in costs for maintenance, servicing, and insuring. 4. Start comparison shopping and look for the "fastest and biggest.