This document provides information about computer systems and their components. It defines a computer system as a collection of interconnected computers that share storage and peripheral devices. It then lists and describes common internal computer components like the motherboard, CPU, keyboard, and monitor. It also covers external components such as printers, scanners, and webcams. The document discusses the differences between hardware and software and provides examples of system software and application software. Finally, it defines an information system and how it collects, processes, and shares data and information.

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2. CH#1
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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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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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