Output devices
Output device :-translate processed information into a form human can understand.
Monitor :-video display unit /display screen or screen output of monitor is clarity depends on resolution. Size measured by the diagonal length of viewing area. E. g. 15", 17", 19", 21".
Standard
Super video graphics array (SVGA)
Extended graphics array (XGA)
Super extended graphics array (SXGA)
Ultra extended graphics array (UXGA)
Pixel use
800*600 15"
1024*768 15" to 17"
1280* 1024 17"to 19"
1600*1200 19"to21"
Type of monitor :
1. CRT :Cathode ray tube. Like T. V. used in house and office.
Advantage -low cost and excellent resolution.
Drawback -size and bulky.
1. LCD :-lipuid crystal Display. Flat panel monitor.
a) Active matrix-thin film transistor (TFT). Not scan down the screen, each pixel is independently activated.
b) Passive matrix-Dual scan monitor.bscanning the entire image.
Printers-
Personal laser printer-print 15 to 17 page per minute.
Shared laser printer -print over 50 pages a minute.
Plotters- create maps, architectural and engineering drawing.plotters used by graphic artist, engineers and architecture.
Photo printer - print photo quality images from digital cameras.
Portable printers -small, portable printer use with not book computers.
Audio output devices - speakers and head phones.
1. Fax machine - facsimile transmission machine. For sending and receiving images through telephone lines.
2. Multifunction devices (MFD) -known as all in one. Combine the capabilities of scanner, printer, fax and copy machine.
3. Internet telephone -internet telephony and voice -over lP (vollP) -use the internet rather than traditional communication lines to support voice communication. To call using telephony requires a high speed internet connection and special software and hardware. Three approaches are
a. Computer -to-compiter
b. Computer -to traditional telephone
c. Traditional telephone -to -traditional telephone
4. Terminal -is an input and output devices that connects to host computer or server.
a. Dumb terminal -cannot process data independently . He. Airline reservation.
b. Intelligent terminal -Net PC or Net personal Computer, have only one internet hard disk and no expansion slots.
c. Network terminal -also known as thin client or network computer. Do not have hard disk and must rely on host compter or server for application and system software.
d. Internet terminal -also known as Web terminal or Web appliance, provide access to the internet and display web pages on standard television.
Output device :-translate processed information into a form human can understand.
Monitor :-video display unit /display screen or screen output of monitor is clarity depends on resolution. Size measured by the diagonal length of viewing area. E. g. 15", 17", 19", 21".
Standard
Super video graphics array (SVGA)
Extended graphics array (XGA)
Super extended graphics array (SXGA)
Ultra extended graphics array (UXGA)
Pixel use
800*600 15"
1024*768 15" to 17"
1280* 1024 17"to 19"
1600*1200 19"to21"
Type of monitor :
1. CRT :Cathode ray tube. Like T. V. used in house and office.
Advantage -low cost and excellent resolution.
Drawback -size and bulky.
1. LCD :-lipuid crystal Display. Flat panel monitor.
a) Active matrix-thin film transistor (TFT). Not scan down the screen, each pixel is independently activated.
b) Passive matrix-Dual scan monitor.bscanning the entire image.
Printers-
Personal laser printer-print 15 to 17 page per minute.
Shared laser printer -print over 50 pages a minute.
Plotters- create maps, architectural and engineering drawing.plotters used by graphic artist, engineers and architecture.
Photo printer - print photo quality images from digital cameras.
Portable printers -small, portable printer use with not book computers.
Audio output devices - speakers and head phones.
combination input and output devices
2. Multifunction devices (MFD) -known as all in one. Combine the capabilities of scanner, printer, fax and copy machine.
3. Internet telephone -internet telephony and voice -over lP (vollP) -use the internet rather than traditional communication lines to support voice communication. To call using telephony requires a high speed internet connection and special software and hardware. Three approaches are
a. Computer -to-compiter
b. Computer -to traditional telephone
c. Traditional telephone -to -traditional telephone
4. Terminal -is an input and output devices that connects to host computer or server.
a. Dumb terminal -cannot process data independently . He. Airline reservation.
b. Intelligent terminal -Net PC or Net personal Computer, have only one internet hard disk and no expansion slots.
c. Network terminal -also known as thin client or network computer. Do not have hard disk and must rely on host compter or server for application and system software.
d. Internet terminal -also known as Web terminal or Web appliance, provide access to the internet and display web pages on standard television.
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