Introduction to the World of Computers

Topics: World Wide Web, Personal computer, Internet Pages: 50 (1471 words) Published: January 5, 2015
INTRODUCTION TO THE
WORLD OF COMPUTERS
Introduction to Information Technology

COMPUTERS IN YOUR LIFE
Why learn about computers?
Basic computer literacy—knowing about and
understanding computers and their uses—is an
essential skill today for everyone
 Computers in the home
Look up information, exchange e-mail, shop,
download music and movies, research products, pay
bills and manage bank accounts, check news and
weather, store and organize digital photos, play
games, plan vacations, work at home, and more


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COMPUTERS IN YOUR LIFE, CONT…


Computers in education: from straight drill-andpractice programs to using the computer as an overall student-based learning tool. Colleges and universities,
classrooms, computer labs, dorms, libraries

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COMPUTERS IN YOUR LIFE, CONT…
 Computers

in the workplace: Multinational
corporation CEOs, check-out clerks, traveling
salespeople, police officers, insurance adjusters,
doctors and nurses, auto mechanics

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COMPUTERS IN YOUR LIFE, CONT…
 Computers

on the go:
portable PCs, Wi-Fi
hotspots, Internet
cafes, ATM machines,
gym ID cards, gas or
parking smart cards,
portable GPS, kiosks
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WHAT IS A COMPUTER AND
WHAT DOES IT DO?
Computer: programmable, electronic device that
accepts data, performs operations, presents the
results, and can store the data or results
 Input—entering data into the computer
 Processing—performing operations on the
data
 Output—presenting the results
 Storage—saving data, programs, or output for
future use
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What Is a Computer and
What Does It Do? cont… a

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DATA VS. INFORMATION


Data = raw, unorganized facts

Can be in the form of text, graphics,

audio, or video


Information = data that has been processed into a
meaningful form

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COMPUTERS THEN AND NOW
 The

computer as we know it is a fairly recent
invention
 The history of computers is often referred to in
terms of generations, from pre-computers and
early computers (before 1945) to fifth
generation computers (now and the future)
 Each new generation is characterized by a
major technological development
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COMPUTERS THEN AND NOW

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HARDWARE
 The

physical parts of a computer are
collectively referred to as hardware
 Internal hardware: located inside the main box (system

unit) of the computer
 External hardware: located outside the system unit and
plug into connectors called ports located on the exterior of the system unit

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HARDWARE, CONT…
 Input

devices: used to input data into the
computer (keyboard, mouse, scanner, electronic
pen, etc.)
 Processing devices: perform calculations and
comparisons needed for processing. The main
processing device is the central processing unit
(CPU)
 Output devices: present the results to the user
(printer, monitor, speakers, etc.)
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HARDWARE, CONT…
Storage devices: used to save data, programs or
output; store data on storage media (floppy disks, CDs,
DVDs, hard drives, flash memory cards, USB flash
memory disks, etc.)
 Communication devices: allow the user to
communicate with others and access remote
information (modem, network adapters, etc.)


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SOFTWARE
 The

programs or instructions used to tell the
computer hardware what to do
 System software: allows a computer to
operate
 Operating system: the main system software
program
 Boots the computer and launches programs etc. at the

user’s direction
 Windows, Mac OS, Linux, etc.
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SOFTWARE
 Application

applications

software: performs specific tasks or

 Creating letters, budgets, etc.
 Managing inventory and customer databases
 Scheduling appointments
 Viewing Web pages
 Sending and receiving e-mail
 Designing homes
 Playing games
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COMPUTER USERS AND
PROFESSIONALS


Computer users (end users): people who use a computer to
obtain information

...
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