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BASICS OF INFORMATION TECHNOLOGY 9... · 2020. 4. 30. · ribbon placed between the print head and...
Transcript of BASICS OF INFORMATION TECHNOLOGY 9... · 2020. 4. 30. · ribbon placed between the print head and...
CHAPTER 1
BASICS OF INFORMATION TECHNOLOGY
Class IXPresented By:Mrs.Karishma Jangid
CHARACTERISTICS OF COMPUTER
Speed
Accuracy
High storage capacity
Diligence
Versatility
Cannot take decisions
Not adaptable
• SPEED : In general, no human being can compete to solving the complex
computation, faster than computer.
• ACCURACY : Since Computer is programmed, so what ever input we
give it gives result with accurately.
• HIGH STORAGE CAPACITY: Computer can store mass storage of data
with appropriate formate.
• DILIGENCE : Computer can work for hours without any break and
creating error.
• VERSATILITY : We can use computer to perform completely different
type of work at the same time.
• CANNOT TAKE DECISIONS: Computer does not work without
instruction.
• NON ADAPTABLE :They perform tasks in given sequence that cannot
change according to circumstances
An external hardware device responsible for taking
computer data and generating a hard copy of that data.
Printers are one of the most commonly used peripherals
and they print text and still images on the paper.
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Printers
Impact PrintersNon-Impact Printers
Daisy
wheel
Dot-
MatrixInkjet
Thermal Laser
An external hardware device responsible for taking
computer data and generating a hard copy of that data.
Printers are one of the most commonly used peripherals
and they print text and still images on the paper.
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Printers
Impact PrintersNon-Impact Printers
Daisy
wheel
Dot-
MatrixInkjet
Thermal Laser
These printers have a mechanism that touches the paper to
create an image. These printers work by banging a print
head containing a number of metal pins which strike an inked
ribbon placed between the print head and the paper.
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A printer that prints without banging a
ribbon onto paper. Laser, LED, inkjet,
solid ink, thermal wax transfer and dye
sublimation printers are examples
of non-impact printers.
A daisy wheel printer is an early type of impact printer invented
in 1969 by David S. Lee at Diablo Data Systems. The printer uses a
metal or plastic disk containing each of the letters, numbers, and other
characters it supports. When printing, the printer rotates the disk to
each character and then using a hammer strike each character into an
ink ribbon to create the character on paper
A dot matrix printer is an impact printer that prints using a
fixed number of pins or wires. In contrast, inkjet and laser
printers technically exhibit dot matrix printing, but they are not
considered "dot matrix printers".
“ Dot Matrix Printer “
An Inkjet printer is a printer for computers. It uses
special ink to print on the paper. Another type of
printing technology is the Laser printer. Inkjet printers
are preferred for printing photos and graphics due to
their high-quality color output, whereas laser printers
are preferred for printing text due to their high contrast
and speed.
A laser printer is a printer for computers. It uses laser or
LED-technology to get small particles of toner from
a catridge onto paper. Very often, this costs less to use than
the ink of inkjet printers. Laser printers often print text more
neatly than inkjet printers, but print photos less clearly.
“ Laser Printer “
“ Ink Jet Printer“
Software
Computer Instructions or data,
anything that can be stored
electronically is Software.
Examples:-
MS word, excel, power point, spread
sheets, library management system
etc.
The set of instructions that takes data
from input devices, manipulate and
process the data, and send it to an
output device is called “software”.
Types of Software
System Software
Application Software
SYSTEM SOFTWAREThe System Software consist of the Operating System and all the
utilities that enable the computer to function.
System software actually controls the hardware so that application software
can perform any action or task.
Example:
Operating Systems, Compiler, Assembler, Interpreter and etc.
An operating system (OS) is system software that
manages computer hardware, software resources, and
provides common services for computer programs.
A compiler is a special program that processesstatements written in a particular programming languageand turns them into machine language or "code" that acomputer's processor uses.
An assembler is a program that converts assembly languageinto machine code. It takes the basic commands andoperations from assembly code and converts them into binarycode that can be recognized by a specific type of processor.
Interpreter is a program that executes instructions written in a high-level language.There are two ways to run programs written in a high-level language. The mostcommon is to compile the program; the other method is to pass the program throughan interpreter.
A device driver is a computer program that operates or controls a particular type ofdevice that is attached to a computer.A driver provides a software interface tohardware devices, enabling operating systems and other computer programs toaccess hardware functions without needing to know precise details about thehardware being used.
A program that performs a very specific task, usually related to managing systemresources. Operating systems contain a number of utilities for managing diskdrives, printers, and other devices.
APPLICATION SOFTWARE
Application software (app for short) is a program or group ofprograms designed for end users. Examples of an applicationinclude a word processor, a spreadsheet, an accountingapplication, a web browser, an email client, a media player, afile viewer, an aeronautical flight simulator, a console game ora photo editor.
General purpose application software is a type ofapplication that can be used for a variety of tasks. It is notlimited to one particular function. Examples of Generalpurpose application software include: Word processors,Spreadsheet and Presentation software.
Special purpose application software is a type ofsoftware created to execute one specific task. Forexample, a camera application on your phone willonly allow you to take and share pictures. Anotherexample would be a chess game, it would onlyallow you to play chess.