Mapa mental
Chapter 2
Contenido del mapa
Chapter 2
Standardisation - The imposition of a set of standards on manufacturing
- Upheld by 3rd parties and trading standards association
- Ideally everything within an industry would be standardised
- Problems
- Cost - Unstandardised hardware may require specific peripherals and devices
- Availability - Unstandardised hardware may lead to low supplies in compatible devices
- Tech support - Little tech support for unstandardised prodcuts
- Examples: USB 2.0 Standard port, windows as a standard OS
Input Devices
- Graphics tablet
- Stylus input
- Custom interface
- Used by designers and architechts
- Flat working area
- Digitiser
- Any device which turns analogue to digital
- E.g. graphics tablet, scanner, camera
- generic description
- Keyboard
- Good for small amounts of input
- Custom keyboards for specific tasks
- Different layouts e.g. QWERTY and DVORAK
- Often combined with a mouse
- Scanner
- OMR optical mark reader
- MICR for bank cheques
- Magnetic card reader
- Barcode translated to product ID
- Mouse
- Combined with WIMP interface
- Variations: rollerball trackerball joystick touchpad
- Needs space to operate
- Ergonomic design
- Graphics tablet
Output devices
- Plotter
- Page size variety A3 A2 A1 etc.
- Uses mathematical co-ordinates
- Very accurate
- Architectural designs
- Monitor
- Variety of sizes
- Signals from computer displayed on screen
- Resolution W*H e.g. 1920*1080
- Printer
- Ink Jet
- b/w and colour
- Replaceable cartridges
- Spray ink onto paper
- Cheap to buy
- Dot Matrix
- Cheap easy to maintain
- Uncommon
- Impact piercing
- carbon forms
- old
- Laser Jet
- High quality
- rotating mirror reflects laser onto photosensitive drum
- Reliable
- Toner is attracted to negative charge
- Ink Jet
- Plotter
Storage devices
- HDD
- 1-3TB
- Internal component (usually)
- Portable
- CD/DVD
- 0.5-5GB
- Optical storage device
- Easily scratched/damaged
- Magnetic tape
- Huge capacity
- Backup networks
- Very cheap
- Flash Drive
- 0.5-16GB
- Portable
- Personal use
- HDD
Specialist software
- Text to speech
- Analyses text and converts it to audio speech
- Speech to text
- Converts analogue (audio) words into digital text
- Auditory feedback
- Plays sounds (alerts) in response to user input
- Screen magnifier
- Can zoom in portions of a monitor for visually impaired users
- Sticky keys
- Allows the system to think keys are being held down after one push
- Predictive text
- Suggests words related to keys pressed
- Text to speech
Specialist Hardware
- Speakers
- feedback
- Output visually impaired
- Braille printer
- outputs docs for visually impaired
- Microphone
- Speech to text
- Quick easy input
- Braille keyboard
- used by visually impaired
- Eye typer
- camera focuses on eyes
- different motions control cursor
- Tongue Joystick
- manipulates cursor
- connected to head
- pushed with tongue
- Foot mouse
- 2 pedals L/R click
- mouse maneuvered with feet
- Puff/Suck
- manipulate the cursor with air flow
- specialist software has additional controls
- Speakers
Types of Software
- Operating System
- Controls allocation of hardware resources
- Controls basic input and output
- E.g. Windows, Linux, OSX
- User interface (UI)
- Method of interacting with an application or operating system
- E.g. menu command line natural language
- Command Line
- Requires codes
- Need knowledge
- can cause damage
- Graphical User Interface (GUI)
- WIMP
- Windows
- Icons
- Menus
- Pointer
- Based on graphics rather than text
- WIMP
- Natural Language
- speak real english
- Converted to digital
- Utility
- Small program performing monitoring and maintenance tasks
- E.g. Anti-virus disk manager defrag
- Application
- Solves particular tasks or problems
- E.g. Word processor Spreadsheet Databases
- Creates documents and files
- Operating System
Información
- Descripción
- ICT Mapa Mental sobre Chapter 2, creado por green.george el 09/04/2013.
- Creado por
- green.george
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