Chapter 1 : Introduction to Computers 9/8/2017 SSK3000 - Chapter 1: Introduction to Computers Ssk3000 – Information technology and its applications

The Digital Revolution An ongoing process of social, political, and economic change brought by digital technology Computers The Internet The digital revolution based on digital electronics electrical signals can represent data, such as numbers, words, pictures, and music The technology driving the digital revolution 9/8/2017 SSK3000 - Chapter 1: Introduction to Computers

The Digital Revolution The process of converting text, numbers, sound, photos, and video into data that can be processed by digital devices Digitization beginning with big, expensive, standalone computers progressing to today’s digital world in which small, inexpensive digital devices are everywhere The digital revolution has evolved 9/8/2017 SSK3000 - Chapter 1: Introduction to Computers

The Digital Revolution 9/8/2017 SSK3000 - Chapter 1: Introduction to Computers

Data Processing Some historians mark this time as the beginning of the digital revolution But engineers built the first digital computers during World War II for breaking codes and calculating missile trajectories 1980s Computers were operated by trained technicians Not everyone knows how to do it Who uses them? processing components for computers were housed in closet-sized cabinets that did not usually include a keyboard or display device Watch the Imitation Game film What does it look like back then? 9/8/2017 SSK3000 - Chapter 1: Introduction to Computers

Data Processing Data processing based on an input- processing-output cycle 9/8/2017 SSK3000 - Chapter 1: Introduction to Computers

The second phase of the digital revolution Personal Computing The second phase of the digital revolution 9/8/2017 Happens when: personal computing becomes the model Characteristics small, standalone computers powered by local software Local software Any software that is installed on a computer’s hard drive SSK3000 - Chapter 1: Introduction to Computers

Personal Computing 9/8/2017 SSK3000 - Chapter 1: Introduction to

Personal Computing 9/8/2017 SSK3000 - Chapter 1: Introduction to Computers

The third phase of the digital revolution Network Computing The third phase of the digital revolution 9/8/2017 Happens when: computers became networked the Internet was opened to public use A computer network a group of computers linked together share data and resources The Internet A global computer network originally developed as a military project Later handed over to the National Science Foundation for research and academic use SSK3000 - Chapter 1: Introduction to Computers

Network Computing a collection of linked documents, graphics, and sounds can be accessed over the Internet The Web (short for World Wide Web) the Web, e-mail, multiplayer games, music downloads, and enormous software applications, such as Microsoft Office, Norton’s Internet Security Suite, etc. 1995–2010 9/8/2017 SSK3000 - Chapter 1: Introduction to Computers

The fourth phase of the digital revolution Cloud Computing The fourth phase of the digital revolution 9/8/2017 Happens when : Local applications are being eclipsed by cloud computing, Cloud computing Provide access to information, applications, communications, and storage over the Internet The expansion of cloud computing Partly due to convergence a process by which several technologies with distinct functionalities evolve to form a single product SSK3000 - Chapter 1: Introduction to Computers

Cloud Computing What is “cloud computing” A computing metaphor where software and computing capacity is delivered as a “service” rather than as a “product” Instead of buying and installing software, you access computing resources over a network Two main ways : Commercial cloud (accessed via “the Internet” Private cloud (accessed via a private network) 9/8/2017 SSK3000 - Chapter 1: Introduction to Computers

Cloud Computing 9/8/2017 SSK3000 - Chapter 1: Introduction to Computers

Cloud Computing important to the digital revolution Convergence important to the digital revolution creates sophisticated mobile devices owners demand access to the same services available from full-size computers on their desks Social media cloud-based applications designed for social interaction and consumer-generated content 9/8/2017 SSK3000 - Chapter 1: Introduction to Computers

Cloud Computing 9/8/2017 SSK3000 - Chapter 1: Introduction to Computers

Cloud Computing 9/8/2017 SSK3000 - Chapter 1: Introduction to

Scaling thing (1) Personal computer Simple, personal computing tasks 9/8/2017 SSK3000 - Chapter 1: Introduction to Computers http://a57.foxnews.com/global.fncstatic.com/static/managed/img/Health/2009/July/660/371/COMPUTER-GIRL_640.jpg?ve=1

Scaling thing (2) Network computer Common tasks, resources 9/8/2017 SSK3000 - Chapter 1: Introduction to Computers http://www.lucartech.com/images/Services_network.jpg

Scaling thing (4) Cloud computer Services .. 9/8/2017 SSK3000 - Chapter 1: Introduction to Computers http://www.bluesci.org/wordpress/wp-content/uploads/2011/09/Sevensheaven_illustration-Cloud_Computing.jpg

Cloud computing 9/8/2017 SSK3000 - Chapter 1: Introduction to Computers http://en.wikipedia.org/wiki/File:Cloud_computing.svg

Cloud Computing Lower computer costs Improved performance Advantages Lower computer costs Improved performance Reduced software costs Instant software updates Improved document format compatibility Unlimited storage capacity Increased data reliability Universal document access Latest version availability Easier group collaboration Device independence 9/8/2017 SSK3000 - Chapter 1: Introduction to Computers

Cloud Computing Requires a constant Internet connection Disadvantages Requires a constant Internet connection Does not work well with low-speed connections Features might be limited Can be slow Stored data might not be secure Stored data can be lost Compatibility for clouds/DB/etc. 9/8/2017 SSK3000 - Chapter 1: Introduction to Computers

Some cloud providers 9/8/2017 SSK3000 - Chapter 1: Introduction to Computers -

Privacy, personal data When it comes to the privacy of data Example there are a lot of problems with the legislation Example the processing of personal data and its protection. Important to take into account The confidentiality of the data that will be stored in a "cloud" To store secret and top secret data in the "cloud" environments is not absolutely safe That's why government agencies are still not switched to “clouds” 9/8/2017 SSK3000 - Chapter 1: Introduction to Computers

9/8/2017 The End SSK3000 - Chapter 1: Introduction to Computers New Perspectives on Computer Concepts, 2016, Parsons, J.J. (2016). 262626 Course Technology, Cengage Learning.