INFO 1 C4-6 - Inputs, Storage, Output
Inputs
Devices Used
Manual Text Entry
Automatic Entry
Keyboards
Pointing Devices
Touchscreens
Optical Character Recognition
Scanner
Used by DVLA to recognise car regs
Enter Images
Optical Mark Reader (OMR)
Magnetic Ink Character Recognition
Bar Code Reading
Magnetic Stripe, Chip and PIN and Smart Cards
Speech Recognition
Digital Cameras
Storage
Types of Storage
Magnetic Storage
Optical
- Data is read by a laser
Magnetico-optical
Flash Memory
Outputs
CD-RW / DVD-RW
- Relatively Cheap and holds about 800Mb
Floppy Disk
- too small and expensive for modern computing
- holds 1.44Mb
Hard Disk
- Main Storage for all computers. Disk can write and read.
- Mass storage, goes up to several Tb
Magnetic Tape
- Used for storing back ups because of the cheapness
- Two types DAT (Digital Audio Tape) and AIT (Artificial Intelligent Tape); these contain a chip that stores a catalogue of the data
CD-ROM
- 800Mb bought with content already on it
- Pre-written material
DVD-ROM
- As above, but with more storage, 4.7Gb
CD-R/DVD-R
- Write once read by many storage device (WORM). Very cheap and efficient for backing up
Memory Stick
- Uses modern USB ports to transfer data; mass storage device, capacity always increasing
SSD
- Alternative to HDD, it is a much faster drive that has large storage capacity.
- emerging tech still quite expensive
VDU
Monitor
Data Projectors
Inkjet Printer
Laser Printer
Dot Matrix Printer
Plotters
Speakers
Robotics
Headphones