Date post: | 27-Jan-2017 |
Category: |
Technology |
Upload: | jibin-sr-plamoottukada |
View: | 422 times |
Download: | 0 times |
1
Welcome…………
2
How is a computer defined?
What Is a Computer?
Electronic device operating under the control of instructions stored in its own memory
The computer first, Accepts data such as raw facts, figures, and symbol then, Processes data into information (Data that is organized, meaningful, and useful ) finally, Produces and stores results
3
What is the information processing cycle?
Input
Process
Output Storage
Communication
4
The Components of a Computer
What is an input device? Hardware used
to enter dataand instructions
_____
5
The Components of a Computer
What is an output device? Hardware that
conveys information to a user
______
6
The Components of a Computer
What is the system unit? Box-like case
containingelectroniccomponentsused to processdata
7
What is the magical inside the black box?
CPU
Memory card
Sound Card
Video Card
Storage Units
Power
Supply
8
The Components of a Computer
What are two main components on the motherboard?
Central Processing Unit (CPU)Also called a processorCarries out instructions that tell computer what to do
MemoryTemporary holding place for data and instructions
9
10
The Components of a Computer
What is storage?
Storage mediaPhysical material on which data, instructions, and information are stored
Storage deviceRecords and retrieves items to and from a storage medium
Holds data, instructions, and information for future use
11
Storage deviceWhat is a floppy disk? Thin, circular,
flexible disk enclosed in rigid plastic shell
A Zip® disk looks similar but has much greater storage capability
(=170 floppy disk)
12
The Components of a Computer
What is a hard disk? Provides much
greater storage capacity than a floppy disk or Zip® disk
Housed inside the system unit
13
The Components of a Computer
What is a compact disc? Flat, round, portable metal disc
CD-ROM CD-RWCapacity: 673~768 MB
DVD-ROM DVD+RWCapacity:4.7 ~ 17.1 GB
14
The Components of a ComputerWhat is miniature storage media?
Digitalcameras
Handheldcomputers
Portable, thin memory cards used in:
15
Why Is a Computer So Powerful?
What makes a computer powerful?
Speed Reliability Accuracy Storage Communications
16
One type is a modem
Networks and the Internet
What is a network?
Enables a connection
between computers
CablesCellular
radioTelephone
lines
Satellites
Communications Media
Communications Device
Collection of computers and devices connected together
17
Networks and the Internet
What is the Internet? Worldwide collection of networks that connects
millions of computers
18
Networks and the Internet
Why do users access the Internet?
2. Information3. Shopping4. Banking and Investing5. Classes6. Entertainment
1. Communications
19
Networks and the Internet
What is the World Wide Web (WWW)?
A Web site is a collection of
related Web pagesA Web page contains text, graphics, sound,
video, and links to other Web pages
You can share information by
creating Web pages or posting photos on a photo community
Billions of documents, called Web pages, available to anyone connected to the Internet
20
Computer Software
How do you install and run a software program?
Step 1.Insert the program disc into the CD-ROM drive
Step 2. Install the software program by instruction in the disc, then run the program
Step 3. The program executes
A program is a series of instructions that tells the computer what to do
21
Computer Software
What is a graphical user interface (GUI)?
Allows you to interact with the software using graphics and icons
Controls how you enter data and how the screen displays information
22
Computer Software
What is system software?
Operating System (OS)is a set of programs that coordinates all activities among computer hardware devices and allows users to run application software
Utility Programs allow the user to perform maintenance-type tasks usually related to managing a computer, its devices or its programs
Programs that control the operations of the computer and its devices
23
Computer Software
What is application software?
Presentation Graphics
Spreadsheet
Database
Word Processing
Programs that perform specific tasks for users
SuitePopular software applications bundled together as a single unit
24
Computer Software
What is a programmer? Someone who develops
application or system software
Programmer writes instructions todirect computer to process data into information
25
Personal Computers
What are the two most popular series of personal computers?
PC and compatibles use the Windows operating system
Apple Macintosh uses the Macintosh operating system (Mac OS)
26
Personal Computers
What is a desktop computer? Designed so all of the components fit on or under
a desk or table
27
Personal ComputersWhat is a notebook computer? Portable, small enough to fit on
your lap(2 lbs to 9 lbs )
Also called a laptop
Generally more expensive than a desktop computer
28
Handheld Computers
What is a tablet PC? Resembles a letter-sized slate Allows you to write on the screen
using a stylus Smaller version is the modular
computer
What are Web-enabled handheld computers?
Allow you to check e-mail and access the Internet Web-enabled telephone is a “smart phone”
29
Handheld Computers
What is a personal digital assistant (PDA)?
Provides personal organizer functions Calendar Appointment book Address book Calculator Notepad
30
Computer Applications in SocietyWhat are some examples of computer applications in society?
Education Finance Government Healthcare Science Publishing Travel Industry