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

Good Evening! INT1005 Introduction to Computer Systems February 2017 Ulrich Werner

Discovering Computers Technology in a World of Computers, Mobile Devices, and the Internet Chapter 1 Digital Literacy

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 Produces data Processing information (input) (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 USB Flash Drive 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 Privacy Malware Health Environmental Concerns 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.

Discovering Computers Technology in a World of Computers, Mobile Devices, and the Internet Chapter 2 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 Wireless/Unguided • Cable Internet • Cable Internet • Wi‐Fi (wireless • Wi‐Fi (wireless service service fidelity) fidelity) • DSL (digital • DSL (digital • Mobile broadband • Mobile broadband subscriber line) subscriber line) • Fixed wireless • Fixed wireless • Fiber to the • Fiber to the • Satellite Internet • Satellite Internet Premises (FTTP) Premises (FTTP) Service 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 Design Create Maintain Plan the Host the the the the website website website website 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!