The following technologies are either obsolete, or limited to special applications though most were, at one time, in widespread use. Most of these printers were limited to monochrome, or sometimes two-color, printing in a single typeface at one time, although bolding and underlining of text could be done by "overstriking", that is, printing two or more impressions in the same character position. Impact printer varieties include, typewriter-derived printers, teletypewriter-derived printers, daisy wheel printers, dot matrix printers and line printers.
There are different types of projectors. They are the following:
1). Image projector, a device that projects an image on a surface 2). 3D projection, a method of mapping three-dimensional points to a two-dimensional plane. 3). Video projector, a device that projects a video signal from computer, home theatre system etc. 4). Movie projector, a device that projects moving pictures from a filmstrip 5). Slide projector, a device that projects a still image with a transparent base 6). Overhead projector, a device that projects a transparent image 7). Opaque projector, a predecessor to the overhead projector 8). Planetarium projector, a device that projects images of sky objects 9). Enlarger, a device used to produce photographic prints from negatives.
Computer speakers, or multimedia speakers, are speakers external to a computer that disable the lower fidelity built-in speaker. Computer speakers range widely in quality and in price. The computer speakers typically packaged with computer systems are small, plastic, and have mediocre sound quality. Some computer speakers have equalization features such as bass and treble controls.
Exercise 5. Questions to answer.
1. What is an output device? 2. Can you mention the types of output devices? 3. What is a text? 4. What is Graphics? 5. What is a tactile output device? 5. What are audio and video output devices? 6. What is a digital image? 7. Do some computers have a built-in graphics capability? 8. What do the others have? 9. What is a tactile feedback technology? 10. How can speech output systems be used? 11. What is the role of special software programs? 12. What is a printer? 13. What are the characteristics of consumer and professional printers? 14. What is a virtual printer? 15. What are the characteristics of laser printer? 16. What are the characteristics of liquid inkjet printers? 17. What are the characteristics of solid ink printers? 18. What are the characteristics of dye-sub printers? 19. What are the characteristics of thermal printers? 20. What are the principal features of obsolete and special-purpose printing technologies? 21. Can you mention some types of projectors? 22. What can you say about computer speakers, or multimedia speakers?
Exercise 6. TranslateRussianintoEnglish
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Exercise 7. Matchwords.
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| ENGLISH WORD | |
| cartridge | |
| dot-matrix printer | , / |
| imagesetter | |
| impact printing | |
| ink-jet printer | |
| laser printer | |
| multi-function printer | |
| page description language | |
| per minute (ppm) | |
| pins | |
| plotter | |
| print server | |
| print spooler | (ppm) |
| printer driver | |
| printout | |
| toner |
| active-matrix | |
| brightness | - , ; |
| Cathode Ray Tube (CRT) | |
| colour depth | |
| diagonally | - |
| digital light-processing | |
| dot pitch | |
| front-screen projector | - |
| home cinema | |
| Liquid Crystal Display (LCD) | |
| phosphor | |
| pixels | |
| plasma display | |
| primary colour | |
| rear projection TV | - (- ) |
| refresh rate | |
| screen size | |
| touch screen | |
| touchpad | |
| video card |
