Module 2

3. The smallest logical unit (on the raster scale) of visual information that can be used to build an image.
5. ....... scanner is a scanner which has a flat piece of glass the document is put on to be scanned.
6. The science of designing working environments and the tools in them for maximum work efficiency and maximum worker health and safety.
8. ...... ratio is the ratio of width to height of an image on a television, motion picture, or computer screen.
10. ..... printer is a high-speed, non-impact printer that uses a laser beam to form images on a page.
12. ........ keys are keys that appear at the top of the keyboard and can be programmed to do special tasks.
14. ........ scanner is a scanner that is held in the hand and passed across the image to be scanned.
16. Dot-...... printer is a printer that uses small closely packed needles or "pins" and an ink ribbon to make a pattern of tiny dots which form the letters on a page.

1. Screen ......... is software that makes the computer screen more readable for users with poor vision.
2. ......... keys are keys that are used to issue commands or to produce alternative characters, e.g. the Ctrl key.
4. ...... printer is a printer in which the image is made by tiny ink droplets which are sprayed from a nozzle onto a piece of paper.
7. The way things appear on your computer monitor; measured in pixels.
9. ...... depth is the number of bits per pixel, which determines the number of shades of gray or variations of color that can be displayed by a computer monitor.
11. ..... scanner is a scanner that is used specifically to scan 35mm slides.
13. Computer-driven video camera accessable on the Internet with a web browser.
15. Visual ...... are indicators that allow deaf users to be notified of incoming mail or error messages without hearing a tone.