Backbone (n) основа, магистраль capability (n) производительность; характеристика
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- 4. Numeric data must be entered into the computer. 5. Joystick is usually associated to playing computer games.
- 8. Micrographics is a way to store output of film. 9. Floppy disks are divided by two sizes of portable magnetic disks.
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1. A keyboard was adapted from the typewriter. 2. Special function keys can be used for special purpose by different programs. 3. There are 10 function keys on the top side of the keyboard. 4. Numeric data must be entered into the computer. 5. Joystick is usually associated to playing computer games. 6. A scanner permits entering text into a computer. 7. Vacuum tube is used to generate the display on most monitors. 8. Micrographics is a way to store output of film. 9. Floppy disks are divided by two sizes of portable magnetic disks. 10. The capacity of disks is determined by the density with which the metal particles are placed on the disk. Answer the following questions: 1. What is the peripheral? 2. What can input units perform? Name the input units. Give them short characteristics. 3. What can the output units perform? Name them and give them short characteristics. 4. How many methods of storing and accessing instructions or data are in the auxiliary storage? 5. How many types of disks do you know? Give the features to the floppy disks, to the hard-disks. Ответ: 1) A peripheral is a device performs input, output or storage functions and is connected to CPU 2) Devices which allow the task of data entry to be performed are called input devices. Input we use to perform the two basic computational tasks: data entry and issuing commands. The keyboard and mouse is the standard mean for the user to input data into the computer. 3) output device perform the result of the processing of system unit. Today, most outputs are visual in nature, produced by two devices: a video display screen monitor or a printer. The most popular monitor is liquid crystal diode (LCD) or gas plasma displays. Each monitor has either a color or a monochrome display and has varying degrees of picture sharpness. Printers come in all kinds of shapes and sizes, with varying capabilities and mechanisms for printing 4) There are two methods of storing and accessing instructions or data in auxiliary storage. 5) There are two types of DASD: floppy disks and hard disks. Floppy disks are divided into two sizes of portable magnetic disks, which are commonly in use. The first of these is the 5.25 floppy disk. The second of these is the 3.5 floppy disk. Both these disks are called diskettes, because the disk material itself is a strong, flexible (floppy) plastic. The 5.25 disk has a heavy, but flexible, plastic envelope that protects the actual disk. The 3.5 disk has a rigid plastic casing to protect the disk. Hard disks operate in a similar fashion to floppy disks, but the disk itself is made from a rigid material – often aluminum. In most personal computers the hard disk and the hard disk drive are single unit that is permanently installed. The hard disk is a sealed unit manufactured to fine tolerance, it can operate at higher speed and store more data and information than floppy disk systems. A common size for a hard disk is 40 megabytes, which can hold as much data as over double density 5.25 floppies. жүктеу/скачать 57,56 Kb. Достарыңызбен бөлісу:
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