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20 terms

computer concepts

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computer
a device that can receive store process and transmit data
3 task involved in a computer application
input process output
computer program
is a set of instructions for the computer to follow
computers are classified according to
speed cost and size
types of computers
microcomputers minicomputers mainframes supercomputers
computer hardware
physical components of a computer that you can see and touch
input devises
keyboard mouse scanner
cpu
processes all the data
memory unit
storse the data
1 or 0
bit (binary digit)
bytes
equals 8 bits
ram
temporarily stores data (power off data gone)
rom
can read data but not change it (power off data still there)
output devises
monitor printer
monitors
grid of pixels
external storage devises
diklettes (floppy disk)
4 essential components of data communication
sender channel receiver protocols
types of ports
serial port parallel port and usb
network communication
enables you to share data
telecomunication
comunicate over long distances