Computer Hardware Flashcards
What are the areas of hardware?
CPU or Processing
Main Memory
Peripheral units
What are the sections of the CPU?
The CU
The ALU
CU
- Supervises the execution of instructions of the stored program in the correct sequence
- Fetching and decoding of instructions
What distinguishes a computer from a calculating machine?
The CU
What are the storage locations of the CU called?
Registers
What is the ALU?
The logical circuitary that performs arithmetic, logical and manipulation operations on operand inputs.
What are the inputs of the ALU?
Operand
Info from the status register
Control signals from the control section
What are the devices under peripheral units?
- Input - Output - Auxiliary storage
Document readers are an example of?
Methods of input
What are the classes of document readers?
Magnetic Ink Character Recognition
Optical Mark Recognition
Optical Character Recognition
What is VDU?
Visual Display Unit
What are the categories of printers?
Impact and Non-impact
What are impact printers?
They print characters by impact onto paper by means of an ink ribbon and print wires of hammers, e.g typewriter, line printer, daisy wheel, dot matrix, teletype
What are non-impact printers?
They work without something hitting a piece of paper, e.g. thermal, laser, inkjet, xerographer, electrostatic
Another name for auxiliary storage devices?
Offline storage media
