Introduction to Computers

Parts

Monitor• CRT Cathode Ray

Tube

• Flat Panel

• Dual Screen

Graphics Array• These are drivers for hardware. Sometimes old

software has to have old drivers.• CGA 16 320 x 200• EGA 64 480 x 320• VGA 256 640 x 480(early 90s)

Show full video, but frames “jumped”. • S-VGA Millions 800 x 600

Animation as smooth as a TV• XGA Millions

•MonitorSize

• 9” 14”, 15”, 17”, 21 The most common size today is 15”.Monochrome (one color) display

Keyboards• Standard Keyboard –

• Enhanced Keyboard-

• Ergonomic Keyboard-

• Virtual Keyboard-

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Standard Keyboard

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Does not have the locator or the keypad sectionsDoes not have the locator or the keypad sections

Enhanced Keyboard

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–Most common todayMost common todayFunction or F-keys are located at the topFunction or F-keys are located at the topNumeric keypad is located at the extreme rightNumeric keypad is located at the extreme right

Locator keys are located between the keypad and regular keyboardLocator keys are located between the keypad and regular keyboard

Ergonomic Keyboard

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Virtual Keyboard

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Pointing Devices

• Mouse

• Trackball

• Touchpad

• Joystick

• Digitizer and Pad

• Touch Sensitive Screen

Mouse

Trackball

Touchpad

Joystick

Digitizer and Pad

Touch Sensitive Screen

Data Storage• 3.5 Micro Floppy – 1.4 MB• 5.25 Floppy – 720 KB• Hard disk drive - TB• CD-ROM – 800 MB• DVD-ROM - 4.7 GB• USB Storage - GBs• Tape Drive - GBs• Jaz and Zip – 1 GB/100 MB

3.5 Micro Floppy

5.25 Floppy

Hard disk drive

Internal External

CD-ROM

DVD-ROM

USB (Jump) Drives

Tape Drives

Jaz and Zip Drives

Modem

• Modulation/Demodulation

• How modems work

Printers

• Dot Matrix Printer

• Ink Jet Printer

• Laser Printer

• Plotter

• Dye Sublimination

Inkjet DMP Laser

Cost

Quality

Color

Maintenance

Dot Matrix• Cost: $40• Quality: Low• DPI: 300 dpi• Color: Possible, requires extra head• Maintenance Needs: Cheap

Ink Jet

• Cost: $40

• Quality: Medium

• DPI: 600

• Color: Yes

• Maintenance Needs: Expensive

Laser

• Cost: $500

• Quality: High

• DPI: 1200

• Color: Yes

• Maintenance Needs: Low, 3 cents copy

Plotter

Used in drafting for mechanical and architectural needs

Dye Sublimination• Student ID Cards

• Mugs

• License Plates

• Ceramic Tile