s of dollars on the technology of today. The best way is to prepare for the future such as making sure your mainframe is upgradeable and contains at least 8 expansion slots, which should already be loaded with enhanced graphics cards, the necessary amount of serial ports etc.. Networks are everywhere in the world of business. A network is a series of computers throughout the company which rely on one or two fileservers. Or it can be used in long distance communication through modem. An example would be that a company located in Calgary can call up its other branch in Toronto via modem, also able to up and download valuable files or records. Networks have their disadvantages also. Computer viruses are always present somewhere in a disk or computer system ready to strike. If an over powering, destructive virus enters a network system, all data can be severely damaged or lost completely. That's why there is back-up drives to store existing data that is written onto the disk each day. Anti virus programs are there to alert the user and wipe the virus off the system before it does any destruction to the data stored on the network. As far as practicality and mobility is concerned, the laptop has been around for quite a long time. A laptop computer is a portable computer, about the size of a brief case. This is a good feature to save time and money. Laptops allow you to connect to fileservers or mini systems after you travel around with them. Once you are at your destination, you can give another system a

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