Good Evening! INT1005 Introduction to Computer Systems February - - PowerPoint PPT Presentation

Good Evening! INT1005 Introduction to Computer Systems

February 2017 Ulrich Werner

Chapter 1

Digital Literacy

Discovering Computers

Technology in a World of Computers, Mobile Devices, and the Internet

A World of Technology

• Because technology

changes, you must keep up with the changes to remain digitally literate

• Digital literacy involves

having a current knowledge and understanding of computers, mobile devices, the Internet, and related technologies

Computers

• A computer is an electronic device, operating under the

control of instructions stored in its own memory

Accepts data (input) Processing Produces information (output)

Computers

• Laptop
• Tablet
• Desktop
• Server

Mobile and Game Devices

Smartphone Digital camera Portable media player E‐book reader Game console

Data and Information

Input Devices

• A keyboard contains

keys you press to enter data and instructions into a computer or mobile device

Input Devices

• A pointing device is an input device

that allows a user to control a small symbol on the screen called a pointer

• Some mobile devices and computers

enable you to speak data instructions using voice input and to capture live full‐motion images using video input

Input Devices

• A scanner is a light‐sensing input device that converts

printed text and images into a form the computer can process

Output Devices

• An output device is any hardware component that

conveys information from a computer or mobile device to one or more people

• A printer is an output device that produces text and

graphics on a physical medium such as paper

Output Devices

• A display is an output device that visually transfers text,

graphics, and video information

Output Devices

• Speakers allow you to hear audio such as music, voice,

and other sounds

– Earbuds – Headphones

Storage Devices

Memory consists of electronic components that store instructions waiting to be executed and the data needed by those instructions A computer keeps data, instructions, and information on a storage medium A storage device records (writes) and/or retrieves (reads) items to and from storage media

Storage Devices

Hard Disk Solid‐State Drive USB Flash Drive Memory Card Optical Disc Cloud Storage

The Internet

• The Internet is a worldwide collection of networks that

connects millions of businesses, government agencies, educational institutions, and individuals

Digital Safety and Security

• It is important that users protect their computers and

mobile devices

Viruses and Other Malware Privacy Health Concerns Environmental Issues

Programs and Apps

• Software, also called a program, tells the computer what

tasks to perform and how to perform them

System Software

• Operating system
• Utility program

Application Software

Communications and Networks

• A communications device is hardware capable of

transferring items from computers and devices to transmission media and vice versa

Communications and Networks

• A network is a collection of computers and devices

connected together via communications devices and transmission media

Uses of Technology in Society

Education Government Finance Retail Entertainment Health Care Travel Science Publishing Manufacturing

That’s what we will do in this course.

Chapter 2

The Internet

Discovering Computers

Technology in a World of Computers, Mobile Devices, and the Internet

The Internet

• The Internet is a

worldwide collection of networks that links millions of businesses, government agencies, educational institutions, and individuals

Connecting to the Internet

Connecting to the Internet

Wired/Guided

• Cable Internet

service

• DSL (digital

subscriber line)

• Fiber to the

Premises (FTTP)

• Cable Internet

service

• DSL (digital

subscriber line)

• Fiber to the

Premises (FTTP) Wireless/Unguided

• Wi‐Fi (wireless

fidelity)

• Mobile broadband
• Fixed wireless
• Satellite Internet

Service

• Wi‐Fi (wireless

fidelity)

• Mobile broadband
• Fixed wireless
• Satellite Internet

Service

Connecting to the Internet

• An IP address is a sequence of numbers that uniquely

identifies each computer or device connected to the Internet

• A domain name is a text‐based name that corresponds to

the IP address

• A DNS server translates the domain name into its

associated IP address

Connecting to the Internet

The World Wide Web

• The World Wide Web (WWW), or web, consists of a

worldwide collection of electronic documents (webpages)

• A website is a collection of related webpages and

associated items

• A web server is a computer that delivers requested

webpages to your computer

• Web 2.0 refers to websites that provide a means for

users to share personal information, allow users to modify website content, and provide applications through a browser

The World Wide Web

• A web app is an application stored on a web server that

you access through a browser

– Web app hosts usually provide storage for users’ data and information on their servers, known as cloud storage

The World Wide Web

• Web publishing is the development and maintenance of

websites

Maintain the website Host the website Create the website Design the website Plan the website

Media on the Web

• Multimedia refers to any application that combines text

with:

Media on the Web

A plug‐in is a program that extends the capability of a Web browser

Other Internet Services

• Email is the

transmission of messages and files via a computer network

• An email program

allows you to create, send, receive, forward, store, print, and delete email messages

Other Internet Services

Other Internet Services

• Instant messaging (IM) is a real‐time Internet

communications service

Other Internet Services

• VoIP (Voice over IP) enables users to speak to other

users over the Internet

Netiquette

• Netiquette is the code of acceptable Internet behavior

Thank you for your attention!