Chapter 2 - The Computer
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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show | Computer/Computer System
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show | screen, or monitor, keyboard, &
mouse/trackpad
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show | Keyboards
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Allows rapid entry of text by experienced users, & Usually connected by cable, but can be wireless | show 🗑
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non-alphanumeric keys are placed differently, & accented symbols needed for different scripts, & minor differences between UK and USA keyboards | show 🗑
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arrangement not optimal for typing, & layout to prevent typewriters jamming! | show 🗑
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show | Alphabetic
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common letters under dominant fingers, & biased towards right hand, & common combinations of letters alternate between hands | show 🗑
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designs to reduce fatigue for RSI, & for one handed use | show 🗑
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show | Chord keyboards
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show | phone pad and T9 entry
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show | T9 predictive entry
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show | Handwriting recognition
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show | Speech recognition
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show | Numeric keypads
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show | Mouse
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show | planar movement, & buttons
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show | Mechanical
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show | Optical
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show | Touchpad
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show | Touchpad
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ball is rotated inside static housing. & like an upsdie down mouse! | show 🗑
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show | Thumbwheels …– for accurate CAD
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show | Thumbwheels …– for fast scrolling
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show | Joystick
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show | Joystick
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for laptop computers, & miniature joystick in the middle of the keyboard | show 🗑
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show | Touch-sensitive screen
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direct pointing device | show 🗑
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small pen-like pointer to draw directly on screen | show 🗑
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may use touch sensitive surface or magnetic detection | show 🗑
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show | Stylus
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show | Light Pen
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Mouse like-device with cross hairs, & used on special surface and rather like stylus | show 🗑
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very accurate & used for digitizing maps | show 🗑
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control interface by eye gaze direction. & uses laser beam reflected off retina | show 🗑
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show | Cursor keys
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show | bitmap displays
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show | Jaggies
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softens edges by using shades of line colour & also used for text | show 🗑
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show | Cathode ray tube
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show | Cathode ray tube
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show | Liquid crystal displays
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draw the lines to be displayed directly, & no jaggies, & lines need to be constantly redrawn , & rarely used except in special instruments | show 🗑
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Similar to random scan but persistent => no flicker. & Can be incrementally updated but not selectively erased. & Used in analogue storage oscilloscopes | show 🗑
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used for meetings, lectures, etc. | show 🗑
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usually wide screen | show 🗑
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lots of small screens together | show 🗑
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show | projected
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show | back-projected
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show | situated displays
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thin flexible sheets, & updated electronically | show 🗑
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show | cockpit and virtual controls
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six-degrees of movement: x, y, z + roll, pitch, yaw | show 🗑
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fibre optics used to detect finger position | show 🗑
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show | VR helmets
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show | whole body tracking
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ordinary screen, mouse or keyboard control, & perspective and motion give 3D effect | show 🗑
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use stereoscopic vision, & VR helmets, & screen plus shuttered specs, etc. | show 🗑
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mve head … lag … display moves | show 🗑
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show | depth perception
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
cessy_comscie