計算機外文翻譯---計算機引論-其他專業(編輯修改稿)

　

【文章內容簡介】 M drive, and a DVDROM drive. A disk drive is a device that reads from and writes onto a disk. A floppy disk consists of a thin, circular, flexible disk enclosed in a plastic shell. A floppy disk stores data, instructions, and information using magic patterns and can be inserted into and removed from a floppy disk drive. A ZIP DISK give is a higher capacity floppy disk that can store the equival ent of about 70standard floppy disks. A hard disk provides much greater storage capacity than a floppy disk. A hard disk usually consists of several circular disks on which data, instructions, and information are stored magically. These disks are enclos ed in an airtight, sealed case, which often is housed inside the system unit. Some hard disks are removable, which means they can be inserted and removed from a hard disk drive, much like a floppy disk. Removable disks are enclosed in plastic or metal cartridges so that they can be removed from the drive. The advantage of removable media such as a floppy disk and removable hard disk is it can be taken out of the puter and transporter or secured. Another type of disk used to store data is the pact disc . A pact disc stores data using microscopic pits, which are created or played using a CDROM drive, which is accessed or played using a CDROM drive. A variation of the standard CDROM, you can also erase and store data on a CDRW. A newer type of pact disc is a FVDROM, which has tremendous storage capacities enough for a fulllength movie. To use a DVDROM, you need a DVDROM drive. Communications Devices Communication devices enable puter users to municate and to exchange items such as data, instruction, and information with another puter. Communication devices transmit these items over transmission media, such as cable, telephone lines, or other means, used to establish a connection between two puters. A modem is a munication device that enables puters to municate via telephone lines or other means. Although modems are available as both external and internal devices, most are internal。 that is, contained within the system unit. 4. Why is a puter a powerful tool A puter’s power is derived from its capability of performing the information processing cycle operations with speed, reliability, and accuracy。 its capacity to store huge amounts of data, instructions, and information。 and its ability to municate with other puters. Speed Inside the system unit, operation occurs through electronic circuits. When data, instructions, and information, flow along these circuits, they travel at close to the speed of light. This allows billions of operations to be carried out i n a single second. Reliability The electronic ponents in modern puters are dependable because they have a low failure rate. The high reliability of ponents enables the puter to produce consistent results. Accuracy Computers can process large amounts of data and generate errorfree results, provided the data is entered correctly. If inaccurate data is entered, the resulting output will be incorrect. This puting principle known as garbage in, garbage out (GIGO), points out that the accuracy of a puter’s outp