How can we help?
You can also find more resources in our
Select a category
Something is confusing
Something is broken
I have a suggestion
What is your email?
What is 1 + 3?
Anything connected to your computer
to put information into a computer
enter information in the form of words, numbers, and punctuation
you can point to objects, select objects, and move objects
collects information in the form of pictures
input device that usually has buttons that can be pressed to send instructions
used to input audio such as music into a computer
captures photographs as digital files that can be uploaded directly to a computer
allows users to connect
external input devices to the computer system
information out of a
information visually, just like a television set
transfer images from a monitor to
paper. For instance, when you key an essay on a computer,
you can then print it out to turn in for class
carries information in the form of sound
The part of the computer that processes
information has many parts that work together
brain of a computer. A computer
makes almost all of its calculations in the microprocessor.
Not all microprocessors are the same
the number of calculations the processor can
do each second.
is made of one
microprocessor in small computers
where computers keep their information, comes in
the form of computer chips.
A storage device
another place where information is kept in a computer
is the most widely used secondary storage device. They can be internal or external
contains a small portable disk inside a plastic cover. Floppy disks can hold up to 1.4 megabytes of information
has a portable disk inside a plastic case. A ZIP disk can hold 100 to 750 megabytes
uses chips to hold information. You can add information to flash memory in large chunks rather than piece by piece, making storage faster and easier than with other types of memor
use lasers to read and write information
optical disk that can hold up to 1 gigabyte of information
is a CD-ROM that does not yet contain any information
an optical disk that can record information many times
is a group of computers that are connected to each other
Local Area Network (LAN)
is a connected group of computers that are close to one another
Wide Area Network (WAN )
that are not close to each other
operating systems (NOS)
help computers share information
network interface card (NIC
so that the computers can communicate over the network.
manages the flow of information on a network
actual arrangement of computers
in a network