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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| is made up of various elements each of these elements affects the interaction input devices | show 🗑
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| show | screen, or monitor, keyboard, &
mouse/trackpad
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| Most common text input device | show 🗑
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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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| keys arranged in alphabetic order, & not faster for trained typists, & not faster for beginners either! | show 🗑
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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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| show | special keyboards
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| only a few keys - four or 5 letters typed as combination of keypresses | show 🗑
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| show | phone pad and T9 entry
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| type as if single key for each letter, & use dictionary to ‘guess’ the right word, & hello = 43556 … | show 🗑
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| show | Handwriting recognition
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| Improving rapidly, & Most successful when: | show 🗑
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| show | Numeric keypads
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| Handheld pointing device: very common, & easy to use | show 🗑
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| Two characteristics of the mouse | show 🗑
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| show | Mechanical
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| light emitting diode on underside of mouse, & may use special grid-like pad or just on desk | show 🗑
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| show | Touchpad
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| show | Touchpad
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| show | Trackball
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| show | Thumbwheels …– for accurate CAD
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| single dial on mouse | show 🗑
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| indirect, pressure of stick = velocity of movement | show 🗑
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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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| show | Touch-sensitive screen
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| show | Stylus
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| show | Stylus
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| used in PDA, tablets PCs and drawing tables | show 🗑
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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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| show | Eyegaze
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| show | Cursor keys
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| show | bitmap displays
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| show | Jaggies
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| show | Anti-aliasing
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| show | Cathode ray tube
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| show | Cathode ray tube
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| Smaller, lighter, and … no radiation problems. | show 🗑
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| show | Random Scan (Directed-beam refresh, vector display)
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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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| show | large displays
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| usually wide screen | show 🗑
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| show | video walls
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| RGB lights or LCD projector. & hand/body obscures screen | show 🗑
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| show | back-projected
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| show | situated displays
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| show | Digital paper
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| show | cockpit and virtual controls
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| show | the 3D mouse
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| fibre optics used to detect finger position | show 🗑
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| detect head motion and possibly eye gaze | show 🗑
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| accelerometers strapped to limbs or reflective dots and video processing | show 🗑
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| show | desktop VR
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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:
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