Chapter 1 - Introduction to Computers and the Internet Basic functions of a Computer Input – entering info into the computer (e.g. keyboard, mouse, mic, touchscreen) Processing – perform operations on the data (e.g. do calculations to play a game) Output – present the results (e.g. display on monitor, speakers, printer) Storage – save data, programs for future use (e.g. hard drive, flash drive, DVD) Communications – communicate with other computers (e.g. modems and routers communicate with the network or Internet)

Generations of Computers

Categories of Computers Smart Phone Tablet Computer – e.g. iPad Desktop Computer – usually a non-portable Windows PC or Mac. Laptop/Notebook - a portable computer usually running Windows or Mac OS. Servers – computers that host data and services such as databases, web servers, and email servers. Mainframe Computers – large multi-user computers used by businesses. Supercomputer – fastest computers for CPU intensive applications such as science and engineering. Embedded computer – a computer built into a device for a single purpose. E.g. televisions and cars have embedded computers. Internet Appliance – home devices and appliances connected to the Internet – e.g. smart light bulbs, video doorbell, home AI devices

Cloud Computing Virtualization Cloud Computing refers to data and programs being located on the Internet instead of one’s own computer. Examples include iCloud, OneDrive, Google Drive Virtualization Virtualization is the creation of a virtual computer platform that runs on a different platform. In this picture, the Windows OS is being run virtually on a MacOS computer.

Internet The Internet is the largest computer network in the world. The word “Internet” comes from “Inter-connected networks” because the TCP/IP protocol allows for everyone’s own network to connect to others. The company that provides you with Internet access is called an ISP (Internet Service Provider). Name some ISP’s that you use? The World Wide Web (WWW) refers to the collection of web pages that link to each other. Note that web pages are only one application the Internet is used for. What else do we use the Internet for other than WWW? Every computer and web server on the Internet is identified by its IP address (same idea as a telephone number). The domain name system (DNS) allows us to use domain names (e.g. Facebook.com) instead of its IP address (e.g. 69.63.189.16). What’s the IP address of your computer?

Domain Names A domain name identifies a web site on the Internet – e.g. Amazon.com The top-level domain (TLD) was originally intended to identify the type of organization: Soon after, new 2 letter TLD’s were set up for each country (e.g. .us or .mx) A few more have been added since then such as .jobs and .mobi Go to a domain name registrar and search for yourname.com Is it already registered? URL (uniform resource locater) uniquely identifies a web site. It is also just known as the web site’s address. e.g. http://mypccourse.com/cosc1301/default.html What the protocol? TLD? folder(s)? file?

Protecting Your Computer Do not open executable (.exe) e-mail attachments. These could be contained in a compressed zip folder. You do not get viruses from pictures, music, or video. Be careful that you are not tricked into installing a program when viewing them. E.g. a new media player, plug-in, download manager, etc. Think twice about installing any program. Do you really need it? Does it come from a reputable software company? Is the site you’re downloading it from reputable? Password protect your computer’s login and your phone. If it gets stolen then your personal information could be compromised. Backup!!!! You only need to brush the teeth you want to keep. You only need to backup the data you want to keep.

Intellectual Property Name the different types of Intellectual Property (click) Books, Music, Movies, Paintings, Trademarks, Inventions, Software The three main types of intellectual property rights are 1. Copyrights – protects books, music, movies, software. They normally last for 70 years after the creator’s death. 2. Trademarks – protects a phrase, symbol, or design that identifies a product. 3. Patents – protects inventions. http://www.youtube.com/watch?v=cuIJRsAuCHQ

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