Data is information such as numbers, strings of characters or images. All
data must entered into the computer for processed. Data can read a file that
typed in via the keyboard or scanned like a bar code. From a computer
programmer's viewpoint raw data must to processed.
Computers process a lot of data because they can solve the data much
more quickly than a person. Most data processing is human and likely human
error high if not processed by computer. Computers process data so fast and
their speed is measured in MIPS (Millions of Instructions Per Second).
A computer that uses a Central Processing Unit or CPU to do all decisionmaking
and data processing. The CPU has set of instructions that within and
it follows when it receives a command. Programmers use different languages
to give for the CPU because it has users around the world.
The processed data is showed on the computer for editing, viewing or
playing. The CPU get instructions from the user to save the data for security
on the hard drive and user can choose to modify, copy, move, edit or delete
the data. Some of the output that data is converted into documents, video
files and audio files.
A computer system is include three main parts are hardware, software
and users. All components connected to the computer by cable or wireless
access point are hardware. All most the parts that include the CPU, monitor,
keyboard and mouse. In addition machines such as printers and scanners are
considered part of the computer's hardware. Software consists of the
computer applications installed on the computer and used to execute
functions. Users are the people who provide instructions to the computer.