tech in act chap 2

– Gathers data (users input data)

– Processes data into information

– Outputs data or information

– Stores data and information

– Binary digit

– 0 or 1

– 8 bits

h l b d h

Each letter, number, and character = a

string of eight 0s and 1s

– Application software

– System software

• CRT (Cathode­Ray Tube )

• LCD (Liquid Crystal Di l )

• Impact printers:
• – Dot­matrix

• • Nonimpact printers
• – Inkjet
• – Laser

• • Specialty printers
• – Multifunction
• – Plotters
• – Thermal printers

• Box that contains the central electronic components of the computer:

• – CPU/RAM/
• - motherboard
• – Expansion cards

Expansion cards

• –Power supply
• - Storage devices

Essential electronic components used to process data

• • Types of components:
• – Power supply
• – Hard disk drive
• – Motherboard
• – CPU

Expansion cards – Expansion cards

• • CPU
• • RAM
• • Expansion cards and slots
• • Built­in components

• • 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

• • Random access memory (RAM)
• • Stores instructions and data
• • Temporary (volatile) storage
• • Operates in nanoseconds

• • Mainframes
• • Supercomputers
• • Embedded computers