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tech in act chap 2
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A computer’s four major functions:
– Gathers data (users input data)
– Processes data into information
– Outputs data or information
– Stores data and information
Bit
– Binary digit
– 0 or 1
Byte
– 8 bits
h l b d h
Each letter, number, and character = a
string of eight 0s and 1s
Two broad categories of software
– Application software
– System software
Monitor Types
• CRT (CathodeRay Tube )
• LCD (Liquid Crystal Di l )
Printers
Impact printers:
– Dotmatrix
• Nonimpact printers
– Inkjet
– Laser
• Specialty printers
– Multifunction
– Plotters
– Thermal printers
The System Unit
• Box that contains the central electronic components of the computer:
– CPU/RAM/
- motherboard
– Expansion cards
Expansion cards
–Power supply
- Storage devices
Inside the System Unit
Essential electronic components used to process data
• Types of components
:
– Power supply
– Hard disk drive
– Motherboard
– CPU
Expansion cards – Expansion cards
The Motherboard
• CPU
• RAM
• Expansion cards and slots
• Builtin components
Central Processing Unit (CPU)
• Referred to as the “brains” of the computer
• Controls all functions of the computer
• Processes all commands and instructions
• Can perform billions of tasks per second
Memory Module
• Random access memory (RAM)
• Stores instructions and data
• Temporary (volatile) storage
• Operates in nanoseconds
Specialty Computers
• Mainframes
• Supercomputers
• Embedded computers
Author
Anonymous
ID
16151
Card Set
tech in act chap 2
Description
tech
Updated
2010-04-25T22:26:31Z
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