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ECDL 5 Module 1 Dr. Stephanos Mavromoustakos 1

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The programs and instructions that make the computer to work Types: System Software in charge of the operations and control of the computer (e.g. Operating system, File Management, etc) Application Software (e.g. Word processing, Spreadsheets, Presentations, Email, etc.) 3

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Responsible for the operation of the system Purpose of the Operating System: It manages the hardware and software resources of the system. It provides a stable, consistent way for applications to deal with the hardware without having to know all the details of the hardware It provides file management and security) Previously it was based on CLI-Command Line Interface, Today are GUI-Graphical User Interface 4

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5 CLI GUI

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CLI DOS UNIX GUI Windows XP Windows Vista Windows 7, 8 Mac OS Linux 6 DOS UNIX Windows 7 Mac OS Linux

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Word processing Microsoft Word Spreadsheet Microsoft Excel Database Microsoft Access Presentation Microsoft PowerPoint E-mail Microsoft Outlook, Outlook express Web-browsing Microsoft Internet Explorer, Mozilla Firefox, Google Chrome. 7

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2. Design 3. Programming 4. Testing 1. Analysis 8

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Voice recognition Screen reader Screen magnifier On-screen keyboard 9

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2 or more computers connected to each to share resources Purpose Communication File sharing Printer sharing Resource sharing 11

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LAN - Local Area Network WAN Wide Area Network 12 WAN (Wide Area Network)

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WLAN Wireless Local Area Network 13

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Network Topologies 14

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The server provides services to the clients 15

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Advantages Exchange of messages (Communication) File sharing Share resources Low cost for software etc Disadvantages Setup and maintenance cost Low security Viruses etc 16

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A global network of interconnected networks WWW - World Wide Web All the web-sites on the Internet 17

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Internet WWW (World Wide Web) Website / Webpage Hypertext / Hyperlink HTML (HyperText Markup Language) HTTP (Hypertext Transfer Protocol) Web browser URL (Uniform Resource Locator) http://www.google.com http://www.google.com 18 http://www.walthowe.com/glossary http://www.netlingo.com/dictionary

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WWW (World Wide Web) E-mail FTP (File Transfer Protocol) Social Media (e.g. Facebook) Chat (e.g. MSN) Newsgroups Forums E-commerce (on-line shopping) E-learning 19

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Intranet A small Internet accessed only from within an organization Extranet Intranet accessible from outside the organization through a password 20

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Downloading and Uploading Transfer Rate bps (bits per second) kbps (Kilobits per second) 1000 bps mbps (Megabits per second) 1 000 000 bps 21

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PSTN Public Switch Telephone Network Analog network Connection through dial-up modem (dial-up connection) Transfer rate 56kbps ISDN Integrated Services Digital Network Digital network Transfer rate 128kbps DSL Digital Subscriber Line Large bandwidth Connection through DSL modem (broadband connection) Transfer rate 40Mbps ADSL Asymmetric DSL Faster download than upload 22

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23 Ethernet cables with RJ-45 plugs

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High speed Always on Flat cost Increased danger for external attacks 24

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Phone line Mobile phone Wi-Fi 3G Mobile phone modem Cable connection o Cytanet Cablenet Primetel etc. Wireless o Wi-Fi o Satellite 25

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Advantages Speed Processing large volumes of information Storage of large volumes of information Accuracy Flexibility Consistency and reliability Lower operating cost Limitations Initiative Lack of creativity Lack of Human Contact 27

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E-commerce E-banking E-government E-learning Teleworking 28

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Advantages Access to a wide variety of products High Availability Lower Prices Independent of geographic location Increased information Price comparison Expand turnover Disadvantages Lack of Human Contact Lack of trial Risk of financial fraud 29

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Learning through electronic and usually on-line ways E-learning platforms, e.g. www.moodle.comwww.moodle.com http://moodle.euc.ac.cy/ Characteristics: Flexible time and location Use of multimedia Cost effectiveness 30

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Advantages o Less commuting o Increased concentration o Flexible schedule o Reduced company space Disadvantages o Lack of human contact o Less teamwork o More self-discipline needed 31

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E-mail Hotmail, Gmail, Instant Messaging MSN Vo IP Voice over Internet Protocol Skype (http://www.skype.com)http://www.skype.com Internet posting RSS feed Really Simple Syndication Blog Podcast iPod + broadcast Virtual Communities 33

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Social networking Facebook, Twitter Internet forums Chat rooms Windows Live Messenger Online computer games Publishing and Content sharing Facebook, YouTube 34

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Health RSI Repetitive Strain Injury Neck and back strain Eye strain and headaches Ergonomics Adequate lighting and ventilation Proper work attitude Precautions Wellness techniques (Stretch, Alternating eye focus, etc) Taking breaks 36

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Natural Disasters Terrorist actions Human errors Mechanical damage Electricity problems Computer Viruses Disaster / Theft from hackers 40

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Username and password Good practices Private and secure Regular change Long Use mixed letters, numbers and symbols Combine uppercase and lowercase letters Make sure you remember it 41

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Data backup Internet firewall Theft prevention Locked doors Usernames / passwords H/W Security cables Anti-virus protection Know what you are downloading Do not open unknown email attachments Do not exchange storage devices Use updated anti-virus software 42

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Licensed software EULA End User License Agreement o Single user license ( ) o Multi user license ( ) o Site license ( ) Shareware Freeware Open source 44

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Privacy Name Address Date of Birth Family status etc Personal Sensitive data Racial / Ethnic origin Political judiciously Health Erotic Orientation Prosecutions etc 45

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Rights The right to information The right to access The right to correct or delete Obligations of the Controller Principle of purpose Principle of proportionality Principle of accuracy Principle of conservation Principle of Security 46