Give the correct definitions of the following terms

1. Read and translate the text
All computer systems, regardless of their size, have the same four hardware 
components: 
1. 
A processor or CPU
, where the data input is processed according to the 
program. 
2. 
Input/output devices
or peripherals such as the keyboard and printer, which 
receive data from people and enter it into the computer for processing, then send it 
back to people so it can be used. 
3. 
Storage components
such as disk drives or tape drives keep data for later use. 
4. 
Routing and control components
, which direct the instructions and/or data from 
one component to the next making sure each does its task properly. 
Computers are generally classified as general-purpose or special purpose machine. 
A general-purpose computer
is one used for a variety of tasks without the need to 
modify or change it as the tasks change. A common example is a computer used in 
business that runs many different applications. 
A special-purpose computer
is designed and used solely for one application. The 
machine may need to be redesigned and certainly reprogrammed, if, it is to 
perform another task. Special-purpose computers can be used in a factory to 
monitor a manufacturing process; in research to monitor seismological, 
meteorological and other natural occurrences; and in the office. 
So all computers have in common, but certain computers differ from one another. 
These differences often have to do with the way a particular computer is used. That 
is why we can say there are different types of computers that are suited for 
different kinds of work or problem solving. 
Personal computer
is a computer system that fits on a desktop that an individual 
can afford to buy for personal use, and that is intended for a single use. 
Personal computers include desktops, laptops and workstation. Each type of a 
personal computer shares many characteristics in common with its counterparts, 
but people use them in different ways. 
Desktop personal computers
are used for education, running a small business, or in 
large corporation, to help office workers be more productive.
The Laptop Personal Computer
is a computer that people can take with them, 
laptop is used by a single individual but can be used in many different places, it is 
not confined by its size or weight to a desktop. It has the same components as a 

desktop machine but in most cases the monitor is built in. The printer is usually 
separate. 
The Workstation
is a computer that fits on a desktop, but is more powerful than a 
desktop computer. The workstation has a more powerful microprocessor, is able to 
service more than one user, has an easy to use interface and is capable of 
multitasking. While these three characteristics used to be unique to workstation, 
they are being adapted to the more powerful 386 and 486 personal computers over 
time. 
Workstations are designed for three major tasks: scientific and engineering, office 
automation and education. 
The Minicomputer
, or mini, is a versatile special or general-purpose computer 
designed so that many people can use it at the same time. Minis operate in ordinary 
indoor environments; some require air conditioning while others do not. Minis also 
can operate in less hospitable places such as on ships and planes. 
Like all computers, the minicomputer is designed as a system. CPUs, terminals, 
printers and storage devices can be purchased separately. Mini systems are more 
mobile, easier to set up and install. A minicomputer system combined with 
specialized equipment and peripherals is designed to perform a specific task. A 
popular minicomputer is the Digital VAX Computer. 
Mainframe is the largest general-purpose computer. It is designed to be used by 
hundreds even thousands of people. A mainframe uses the same basic building 
blocks of a computer system: the CPU, various I/O devices and external memory. 

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