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1Computer Hardware
2Computer Architecture Principles
3Central Processing Unit (CPU)
4Arithmetic and Logic Unit (ALU)
5Control Unit (CU)
6CPU Registers
7Program Execution
8Microprocessor Chips
9CPU Speed
10 CPU Local Bus
11Memory (Primary Storage Device)
12Random Access Memory (RAM)
13Memory Modules
14Special Memory Devices
15 Cache
16Read-Only Memory (ROM)
17Buses
18Boards and Ports
19Secondary Storage Devices
20 Floppy-Diskette Drive (FDD)
21Floppy-Diskette Drive: Properties
22Floppy Diskette: Capacity Calculation
23 Hard-Disk Drive (HDD)
24Compact-Disk (CD) Drives
25Compact Disk-Read Only Memory (CD-ROM) Drive
26Compact Disk-Recordable (CD-R) Drive
27Compact Disk-ReWritable (CD-RW) Drive
28 Digital-Versatile-Disk (DVD) Drive
29Computer Peripherals
30Keyboard
31Mouse
32Mouse: Internal Work
33Mouse: Connecting to Computer
34Trackball, Joystick, Pointing Stick
35Scanner
36Monitor
37Cathode-Ray Tube (CRT) Monitor
38Liquid-Crystal Display (LCD) Monitor
39Video Cards (Display Adapters)
40Printers
41Dot-Matrix Printer
42Inkjet Printer
43Laser Printer
44Plotter
45Speaker and Microphone
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Dot-Matrix Printer
Dot-matrix printer and cartridge.
  Dot-matrix printer and cartridge. Internal work of a dot-matrix printer.



This printer works like a typewriter. A print head travels back and forth along a bar. The head has a number of pins that can pop out to strike the paper through an inked ribbon. Typical numbers of pins are 9 and 24. This printer has the lowest print resolution and hence it yields the lowest print quality. It is the slowest and it works through strikes (impacts), so it has the highest noise level. However it is the cheapest. Also, it the most suitable for printing on multicopy forms that rely on impact to transfer printed characters from one copy to the next. It is also most suitable for printing on continuous perforated papers.  
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