2. System
Def #1:
A set of detailed methods, procedures, and routines
established or formulated to carry out a specific
activity, perform a duty, or solve a problem.
Def #2:
A group of interacting, interrelated, or interdependent
elements forming a complex whole.
3. Sub-system
A major part of a system which itself has the
characteristics of a system, usually consisting of
several components.
4. Computer System
A complete, working computer. Computer
systems will include the computer along with any
software and peripheral devices that are
necessary to make the computer function. Every
computer system, for example, requires an
operating system.
7. Introduction to Computer
An electronic device designed to accept data,
perform prescribed mathematical and logical
operations at high speed, and display the results
of these operations.
8. Advantages
It helps you automate various tasks that you cannot
do manually.
It helps you organize your data and information in a
better way.
It has much more computing and calculating power
then an ordinary human.
It may help your work to be a lot easier.
It may be the storage of your important data and
files.
9. Advantages
It may be your handy book.
It may help you solve problems faster than an
ordinary human being can do.
It has speed, storage, reliability, consistency and
communications.
It helps you to find useful information using the
Internet.
It helps in businesses, factories, offices, schools
and homes.
10. Disadvantage
It destroys your social life and interactions with
humans if you do not maintain the balance.
It may effect to the destruction of your eye sight
due to radiation.
It may cause pimples and wrinkles.
It may damage your studies and life.
Too much time in front of monitor may adverse
effect your eye sight and can also make you fat.
11. Disadvantage
The way it distracts and can deviate our thoughts
and activities towards unproductive activities.
It could cause violation of privacy, impact on
labor force, health risks, impact on environment,
distraction from work, and possible antisocial
influences.
Getting away from their real life and getting into
bad lines.
12. Types of Computer
Computer types can be divided into 3 categories
according to electronic nature.
Analog Computer
Digital Computer
Hybrid Computer
13. Analogue Computer
Analogue types of Computer uses what is known as
analogue signals that are represented by a
continuous set of varying voltages and are used in
scientific research centers?
14. Digital Computer
A computer that stores data in terms of digits
(numbers) and proceeds in discrete steps from one
state to the next. The states of a digital computer
typically involve binary digits which may take the
form of the presence or absence of magnetic
markers in a storage medium.In digital computers,
even letters, words and whole texts are represented
digitally.
15. Hybrid Computers
Hybrid computers are the form of computers which
had been designed to display the features and
characteristics of both computers which are the
analog and the digital computers. When the hybrid
computers are used in the form of digital computers
then they are deigned to act as the controller for the
operations carried out in the system. When analog is
taken into account then in that case the computer
acts as a solution provider for different problems that
exit and thus by depicting both the feature, it is found
to be a beneficial computer.
18. Classes by functions
Servers
Workstations
Information appliances
Embedded computers
19. Microcomputers
Microcomputers are the most common type of
computers used by people today, whether in a
workplace, at school or on the desk at home. E.g:
Desktop computers .
Game consoles Laptops.
Notebook computers.
Palmtop computers.
Tablet PC .
Programmable calculator
20. Minicomputers (Midrange computers)
A minicomputer is a class of multi-user
computers that lies in the middle range of the
computing variety, in between the smallest multi-
user systems (mainframe computers) and the
largest single-user systems (microcomputers or
personal computers ), contemporary term for this
class of system is midrange computer, such as
the higher-end SPARC, POWER and Itanium -
based systems from Sun Microsystems, IBM and
Hewlett-Packard.
21. Mainframe Computers&
Supercomputer
A very large and expensive computer capable of
supporting hundreds, or even thousands, of users
simultaneously. In the hierarchy that starts with a
simple microprocessor (in watches, for example)
at the bottom and moves to supercomputers at
the top, mainframes are just below
supercomputers. In some ways, mainframes are
more powerful than supercomputers because
they support more simultaneous programs. But
supercomputers can execute a single program
faster than a mainframe. The distinction between
small mainframes and minicomputers is vague,
depending really on how the manufacturer wants
to market its machines.
22. Servers
server is a physical computer (a hardware
system) dedicated to running one or more such
services (as a host) to serve the needs of users of
the other computers on the network. Depending
on the computing service that it offers it could be
a database server, file server, mail server, print
server, web servers, or other.
23. Workstations
In networking, workstation refers to any computer
connected to a local-area network. It could be a
workstation or a personal computer.
24. information appliance
In information appliance or information device
is any machine or device that is usable for the
purposes of computing, telecommunicating,
reproducing, and presenting encoded information
in myriad forms and applications.
25. Embedded computers
Embedded computers can be compared to
"computers on a chip". All in one so to speak. You
will find them in all kind of appareils that surround
us. Washingmachines, ticketmachines at the
subway, camera's, cars, motors, sewing
machines, clocks. Everywhere needing
something to regulate, control of check
something.
