1. BTT1O
Unit 1 Review

2. The Computer System
4 parts
Hardware
Software
Data
User

3. Types of Hardware Processor (CPU) Memory (RAM)
manages all devices and performs the actual processing of data
Memory (RAM)
holds data and program instructions as the CPU works with them
Input and Output (I/O devices)
Input: keyboard, mouse, microphone
Output: monitor, speakers, printer
Storage devices
Hard drive, optical drives

4. Software
Systems Software
Application Software

5. Techniques for Using a Mouse
Pointing
Clicking
Double Clicking
Dragging
Right Clicking

6. Alternative Input Devices
Scanner
Bar Code Reader
Microphone
Webcam

7. Monitors
Cathode Ray Tube (CRT)
Flat Panel (LCD)

8. Printers
Impact Printers
Dot Matrix
Non-Impact Printers
Inkjet
Laser

9. The Functions of a Computer
Input
Storage
Processing
Output

10. The Four Tasks of a CPU Fetch Decode Execute Store
Gathering code for an instruction
Decode
Interpreting the instruction to determine which functions are to be performed
Execute
Processing the instructions and sending them to their proper destinations
Store
Sending the results of the instructions to the proper memory location for retention

11. Storage Devices Hard drive (40 -200 GB) Floppy Disk (1.44 MB)
CD-R (700 MB)
DVD-R (4.7 GB)
Blu-Ray (25 GB)
Flash Drive/USB Drive (256 MB – 10 GB)

12. Windows

13. Networks
Benefits
Types
LAN
WAN
Topography
Linear
Star

14. Security Hackers vs. Crackers Passwords Firewalls Encryption
Biometrics