...ophisticated communications to encode and unscramble messages, and to keep track of personnel and supplies.IIIHO COMPUTERS ORKThephysicalcomputer and its components are knon as hardare. Computer hardare includes the memory that stores data and instructions. The programs that run the computer are called softare. Softare generally is designed to perform a particular type of task.AThe Operating Systemhenacomputeristurned on it searches for instructions in its memory. Usually, the first set of these instructions is a special program called the operating system, hich is the softare that makes the computer ork. Popular operating systems, such as Microsoft indos and the Macintosh system have a graphical user interface that is, a display that uses tiny pictures, or icons, to represent various commands. To execute these commands, the user clicks the mouse on the icon or presses a combination of keys on the keyboard.BRange of Computer AbilityComputersexistinaide range of sizes and poer. The smallest are embedded ithin the circuitry of appliances, such as televisions and rist atches. These computers are typically preprogrammed for a specific task, such as tuning to a particular television frequency or keeping accurate time.The smallest of the computers can be held in one hand and are called personal digital assistants. They are used as notepads, scheduling systems, and address books LaptopcomputersandPCs are typically used in businesses and at home to communicate on computer netorks, for ord processing, to track finances, and to play games. They have large amounts of internal memory to store hundreds of programs and documents. They are equipped ith a keyboard a mouse, trackball, or other pointing device and a video display monitor or liquid crystal display LCD to display information. Laptop computers usually have similar hardare and softare as PCs, but they are more compact and have flat, lighteight LCD-s instead of video display monitors.orkstationsaresimilar to personal computers but have greater memory and more extensive mathematical abilities, and they are connected to other orkstations or personal computers to exchange data. They are typically found in scientific, industrial, and business environments that require high levels of computational abilities.In the future computersillbecome more advanced and they ill also become easier to use. CEFiprsF0JCJaJCJaJBCJOJQJaJphCJOJQJaJBCJOJQJaJphCJ
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