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Computer applications
The
use
of computers to perform
specific
tasks
Computer
applications
Includes the basics of computer hardware, software, and networking
Helps students to develop basic skills in using Windows and Microsoft Office, and creating web pages
System
A way of working, organizing, or doing something which follows a fixed plan or set of rules
System
the university system
the bank system
Subsystem
A unit or device that is part of a larger system
Subsystem
A department in a university
Computer
An electronic machine that processes data as input to give information as output
Computer system
A computer along with additional hardware and software together
Usage of computer
Storing Important Data
Use Computer for E-Learning
Computer in Education System
Uses of a computer in office work
Use computer for defense purpose
Use Computer for Training purposes
Use Computer in Science and Technology
Use the computer to communicate with people
Background of computer
Mechanical; prior to 1945
Electronic; after 1945
Mechanical computers
Abacus; Dates back to 500 BC
Mechanical adder/subtractor by Blaise Pascal in France (1642)
Difference Engine by Charles Babbage for polynomial evaluation in England (1827)
Binary mechanical computer by Konard Zuse in Germany (1941)
Electromechanical decimal computer by Howard Aiken (1944) - Harvard Mark 1 by IBM
Generations of electronic computers
First Generation (1945-54)
Second Generation (1955-64)
Third Generation (1965-74)
Fourth Generation (1975-90)
Fifth Generation (1991-present)
Advantages of computer
Speed
Reliability
Consistency
Storage
Communications
Disadvantages of computer
Violation of Privacy
Public Safety
Impact on the labor force
Impact on Environment
Digital computer
Devices that are capable of solving problems by processing information in discrete form, operating on data expressed in binary code
Applications of digital computers
Desktops
Laptops
Server
Embedded Computers
Analog computer
A computer that uses a continuous signal to process
Analog computers
Television
Mechanical calculator
Applications of analog computers
Speedometer
Refrigerator
Classification
of Computer
Micro computers
Mainframe computers
Mini Computers
Super Computers
Microcomputer
A complete computer on a
small
scale, designed for use by
one
person at a time
Microcomputer
Data
and
word
processing
Electronic
spreadsheets
Professional
presentation
Graphics
programs
Communications and
database
management systems
Mainframe computer
High-performance
computers with large amounts of
memory
and
data
processors
that process billions of simple calculations and transactions in real time
Mainframe computer examples
zSeries mainframe computer of International Business Machines series (IBM)
Universal Automatic Computer from UNIVAC series
A system named NonStop by the manufacturers of Hewlett
Packard
Mainframe computer
Bulk
data processing for tasks such as censuses
Industry
and consumer statistics
Enterprise
resource planning
Large-scale
transaction processing
Minicomputer
Smaller, less expensive, and less
powerful
than a mainframe but more expensive and more
powerful
than a personal computer
Minicomputer examples
IBM midrange computers
Control Data's CDC 160A and CDC 1700
DEC PDP and VAX series
Minicomputer
Scientific and engineering computations
Business transaction processing
File handling
Database management
Supercomputer
The fastest, most powerful and most
expensive
computer
Supercomputer
examples
Summit
,
United States
Sierra
,
United States
Sunway TaihuLight
,
China
Supercomputer
Quantum mechanics
Weather forecasting
Oil and gas exploration
Molecular modeling
Parts of the Computer System
Hardware
Software
Storage
Unit
Communication
Channels
Software
A series of
instructions
that tells the computer
what to do
and how to do it
Software examples
MS Word
MS Excel
Hardware
The physical elements of a computer
Hardware examples
Keyboard
Mouse
Monitor
Storage unit
Part of the computer system employed to store the information and
instructions
to be processed
Storage unit examples
Memory Cards
DVD
Hard Drive
Communication channel
The medium used to transport information from one
network device
to another
Data
A collection of
unprocessed
items, which can include text, numbers,
images
, audio, and video
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