Using Documentation

information, once recorded, cannot be erased or changed, but it can be read many times. The expression Write Once, Read Many (WORM) describes this type of technology. SWITCH BOXES.— When you want to share printers, you can connect them through a switch or switch box. For example, two or more computers can use one printer, or one computer can use two or more printers. As you can see, you will need a cable between the switch box and each device. You then switch the setting, A or B, on the box to switch signal lines without disconnecting and reconnecting cables. Switches range from this simple, manually operated switch box with two settings to switches that select signal lines automatically and provide buffering capability. Some also provide for both parallel and serial devices. MODEMS.— Modems provide communication between systems. Through them, your system can send or receive data over phone lines. You may also use a null modem cable for communication between systems that are close enough to each other to be connected by cable. A null modem cable creates a communications link that allows devices to communicate without using modems and phone lines. To make the systems and null modem cable fit together, you may need a gender connector or gender changer to bridge two like connectors. As you can see, a basic (low-end) system is only a beginning. As you become more familiar with microcomputers and as technology changes, you will find more and more capabilities and more uses for microcomputers. SETTING UP AND OPERATING MICROCOMPUTERS Before you begin to set up or operate a microcomputer, know what you are going to do. THINK FIRST. Start with the documentation, NOT with the hardware and software. USING DOCUMENTATION The first thing you will want to do when you install or start using a system or a new software package is become familiar with the documentation that comes with it. You will also want to see what other documentation and training materials are available. Don’t get discouraged over the amount of reading material provided to you. It takes time to learn something new, and it takes practice to become proficient. Spend time learning all you can about the software and hardware. Refer to manuals and other help aides when you have problems. You may also have in- house user manuals to use. 1-24