a device that can receive store process and transmit data
3 task involved in a computer application
input process output
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
physical components of a computer that you can see and touch
keyboard mouse scanner
processes all the data
storse the data
1 or 0
bit (binary digit)
temporarily stores data (power off data gone)
can read data but not change it (power off data still there)
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
enables you to share data
comunicate over long distances
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