3. CH#1 computer system
Computer System
Definition:
A system of interconnected computers that share a central storage system
and various peripheral devices such as a printers, scanners, or routers. Each
computer connected to the system can operate independently, but has
the ability to communicate with other external devices and computers.
Components of a Computer System
Can you identify the:
Computer Case
1. Monitor
2. Speakers
3. Keyboard
4. Mouse
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4. CH#1 computer system
5. Printer
6. Scanner
7. Web camera
8. Floppy drive
9. CD or DVD drive
Parts Of Computer System
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5. CH#1 computer system
The two basic parts of a computer system:
1. Hardware:
The hardware is the part of the computer you can touch and
see.(ex. Keyboard, mouse, monitor)
2. Software:
The software is a part of the computer you cannot touch but is
very important. The software is all the programming that makes the
computerrun.
Common computer hardware:
The following is a list of the most common hardware
found on office and home computers.
The monitor is the display screen, similar to a television
screen.
The keyboard is what you type on, similar to a type
writer.
The mouse is small hand held device that attaches to the
computer. It may have two or three buttons.
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6. CH#1 computer system
The computer tower or case is the heart of the system. This is a
box that contain all the parts that make the computer work.
The printer is a device that puts what you have to created on
the paper
The scanner is a device that capture picture so that they
can b seen and used.
Computer Software
Software also called a program, consist of a series of instructions that tells the
computer what to do and how to do.
Types of computer software :
System software
Operating software
Utility program
Application software
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7. CH#1 computer system
System software:
System software consists of the programs that control or maintain the operations of
the computer and its devices.
Operating software:
An operating system is a set of programs that coordinates
all the activities among computer hardware.
Utility program:
A utility program allows a user to perform maintenance-type tasks usually
Application software:
Application software consists of programs designed to
make users more productive and assist them with personal
tasks .
Information system
An information system(IS) is typically considered to be a set of interrelated elements or
components that collect(input), manipulate(processes), and disseminate (output) data and
information and provide a feedback mechanism to meet an objective.
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9. Ch#2 computer categories
Computer categories
Computer systems can be categorized according to their processing speed
and power into:
A microcomputer is a computer that can perform all of its input, process, output,
and storage activities by itself.
A minicomputer is often used in situations where a microcomputer is not
powerful enough but a mainframe is too expensive.
A mainframe is a large, expensive, but powerful computer that can handle
hundreds or thousands of connected users at the same time.
A supercomputer is the fastest, most powerful, and most expensive computer
used for applications that require complex and sophisticated mathematical
calculations.
Other terms related to the classification of computer systems include:
Personal computer
Stand-alone computer
Server
Client computer
Network computer
Workstation
Terminal
Embedded System
The five categories of computer are:
Super Computers
Mainframe Computers
Workstation computer
Micro Computer
Minicomputer
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10. Ch#2 computer categories
Supercomputer:
A computer which, among existing general-purpose computers at any given time,
is http://www.answers.com/topic/superlative, often in several senses: highest computation rate
, largest memory, or highest cost.
Mainframe Computers:
a large digital computer serving 100-400 users and occupying a special air-conditioned room.
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11. Ch#2 computer categories
Workstation computers:
This computer has more computing capacity in its CPU than a typical
personal computer. Scientists and engineers are the main users of
workstations, although people who process graphics find a workstation
necessary, since the processors can handle the huge amounts of data
associated with Graphic files.
Minicomputer:
Minicomputer: A mid-sized computer, usually fitting within a single cabinet about the
size of a refrigerator that has less memory than a mainframe.
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12. Ch#2 computer categories
Micro computer:
Computing device made up of one or more microprocessors,
stored program memory (called read only memory or ROM), random access
memory (RAM), input/output logic, and usually one or
more data input (keyboard/mice/stylus) and
data output (screen/printer) devices. Desktop computers (personal
computers) are all also called microcomputers.
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13. Ch#3 system unit
System Unit:
The system unit refers to the computer itself but does not include the monitor, the keyboard,
the mouse, or any other peripherals. I suppose most people will probably know what you mean
when you refer to "the box," but saying "system unit" will definitely make you sound more
sophisticated
:
Parts of system unit
Mouse:
A device that controls the movement of the cursor or pointer on a display screen. A mouse is a
small object you can roll along a hard, flat surface. Its name is derived from its shape, which
looks a bit like a mouse, its connecting wire that one can imagine to be the mouse's tail,
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14. Ch#3 system unit
Monitor:
A monitor or display (also called screen or visual display unit) is an electronic visual display for
a computer
.
Motherboard:
The motherboard is the main circuit board in a computer. A motherboard provides a way for
hardware in a computer to communicate with each other.
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15. Ch#3 system unit
Keyboard:
In computing, a keyboard is a typewriter-style keyboard, which uses an arrangement of buttons
or keys, to act as mechanical levers or electronic switches.
Central Processing Unit (CPU):
The CPU (central processing unit) is the part of a computer controls the interpretation and
execution of instructions. Generally, the CPU is a single microchip, but that doesn't necessarily
have to be the case. The Central Processing Unit (CPU) is the "brain" of the computer--it is the
'compute' in computer. Without the CPU, you have no computer. AMD, IBM,
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