View
807
Download
1
Category
Tags:
Preview:
Citation preview
Appalo Computer Sytem
Information Technology
Harsha S. WijethungaDip in NIBM, ASLIM, Dip. In HRM, HND in Computer System Design
Appalo Computer Sytem
COMPUTER BASIC PART
MONITOR
SPEAKER
KEYBOARD
MOUSE
CPU
CD-Drive
DVD Drive
Floppy Drive
Flash drive
INPUT DEVICE
OUTPUT DEVICE
SYSTEM UNIT
Appalo Computer Sytem
WHAT IS THE COMPUTER
A computer is a programmable electronic device that can store, retrieve, and process data.Computer is an electronic device that accepts the data. Process it and give the result.
Appalo Computer Sytem
WHAT IS COMPUTER DATA & INFORMATION
INPUTCPU
MAIN MEMORY
OUTPUT
DATA INFORMATION
Appalo Computer Sytem
DATA Input user or other
users May be Number,
text, Sound ,Image May be unintelligible Maybe command or
instruction
INFORMATION Out put from the
computer Is formatted and
understandable Can be printed text,
graphics, images Can be sounds or
video
Appalo Computer Sytem
8.
6.
5.
4.
1.
2.3.
7.
9.
10.
8.
6.
5.
4.
1.
2.3.
7.
8.
6.
5.
4.
1.
2.3.
7.
8.
6.
5.
4.
1.
2.3.
7.
9.
10.
Appalo Computer Sytem
What is a Computer?
A computer is an electronic device that manipulates information or "data." It has the ability to store, retrieve, and process data. You can use a computer to type documents, send email, and surf the Internet. You can also use it to handle spreadsheets, accounting, database management, presentations, games,
and more.
Appalo Computer Sytem
Whether you realize it or not, computers play an important role in our lives. When you withdraw cash from an ATM, scan groceries at the store, or use a calculator, you're using a type of computer.
Appalo Computer Sytem
Software and HardwareIf you use a player piano as an analogy, the piano can be thought of as the hardware and the roll of music as the software.
The software a series of very simple computer instructions carefully organized to complete complex tasks. These instructions are written in programming languages (like BASIC, PASCAL, C...) to help simplify the development of applications.
The hardware is what sits on your desk and executes the software instructions. The player piano is useless unless the roll of music has been written correctly.
Appalo Computer Sytem
Input Devices – "How to tell it what to do"A keyboard and mouse are the standard wayto interact with the computer. Other devices include joysticks and game pads used primarly for games.
Mouse, Keyboard, Joystick, Image Scanner, Webcam, Graphics tablet, Microphone, Light Pen, MICR, OCR, Bar Code Reader
Appalo Computer Sytem
Output Devices -- "How it shows you what it is doing"
The monitor (the screen) is how thecomputer sends information back to you, whether it be surfing the web or writing a memo. A printer is also an output device.
Monitor, Printer, Speaker, Head Phone, Plotter
Appalo Computer Sytem
Peripheral device Input/output
InputMouse, Keyboard, Joystick, Imagescanner, Webcam
, Graphics tablet, MicrophoneOutputMonitor, Printer, LoudspeakerBothFloppy disk drive, Hard disk drive, Optical disc drive,Teleprinter
Appalo Computer Sytem
What is “hardware” ? All the bits that
plug together are hardware System Unit Screen Keyboard Mouse Printer Scanner etc
Appalo Computer Sytem
What is “software” ? Computer programs
and applications are software
They enable the computer to carry out the tasks we need
It is important to choose the right software for the job…
Spreadshe
et
Wor
d Pr
oces
sor
PresentationLetter
Report
Recommended