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The Computer (Positioning pointing and drawing (The Mouse
common and…
The Computer
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Processing and networks
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Networked Computing
Networks allow access to:
- large memory and processing
- other people
- shared resources
Issues
- Network delays leading to slow feedback
- conflicts where many people update data
- unpredictability
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Text entry devices
Keyboard
- Rapid entry of text
- Keypress closes connection allowing character to be sent
Layouts
- QWERTY
- Alphabetic
- Dvorak
- common letters under dominant fingers
- Chord keyboards
- Consists of 4 or 5 keys where combinations of keypress for input
- Phone pad or T9
- Handwriting recognition
- Text can be input using a pen and digesting tablet
- Speech Recognition
- Problems: Background noise, not understanding pronunciation