Computing Basics. Business Education & Computer Science Mr. Dukes

Transcription

1 Computing Basics Business Education & Computer Science Mr. Dukes

2 Types of Computer Software Operating system (OS) Controls communication with hardware Controls interaction with user Examples: Windows, Mac OS, Linux, Unix Application Program designed to do a specific purpose, generally installed on a local computer Online app Program that runs over the Internet inside a web browser Slide 2

3 Types of Operating Systems Slide 3

4 Types of Operating Systems Slide 4

5 Networks Two linked computers is a network A network of computers located within a short distance is called a LAN Most companies operate LANs A network of computers located across a large distance is called a WAN The Internet is a web of computer networks Many LANs linked to each other Slide 5

6 Mousing Around Left-click to select something Double-click to open an application, a file, or an image Click and drag objects around the screen Right-click to open pop-up menus Slide 6

7 Mouse and Pen Pointer Shapes Arrow pointer shows where mouse is located Vertical bar appears in areas where user can enter words or numbers or select text Hourglass pointer indicates that the user should wait Two-sided arrow indicates a resizing handle or window border Slide 7

8 Mouse and Pen Pointer Shapes Move or four-sided arrow indicates an object can be moved Pointing hand appears when user points to a hyperlink Pen appears when using handwriting recognition Slide 8

9 Microsoft Word Slide 9

10 Word s Ribbon Each tab (across top) has different groups of commands (on bottom) Slide 10

11 Application Window: Powerpoint Slide 11

12 Resizing and Moving Windows Slide 12

13 Print Dialog Box Slide 13

14 Image Resolution More pixels = higher resolution Slide 14

15 Viewing Pixels Slide 15

16 Common Graphic File Formats JPEG (.jpg) GIF (.gif) TIFF (.tif) BMP (.bmp) PSD (.psd) PNG (.png) Supports millions of colors. Files can be compressed. Variety of resolutions available. Popular format for internet graphics. Small compressed files. Acceptable for line art and simple animations. High resolution; commonly used in desktop and print publishing. Bitmap format created by Microsoft. Low resolution. Default standard supported by Adobe Photoshop. Will preserve special Photoshop layers and features. Popular format for Internet graphics. Supports 32-bit color and transparency. Best for internet Easy images to manipulate in Microsoft Office applications Best for printed documents Slide 16

17 Image Position Slide 17

18 Image Quality Brightness How light or dark image pixels are Contrast Difference between light and dark pixels Color Hue Saturation Purity of a color or hue Tint Changes the qualities of a hue Slide 18

19 Adjusting Images Auto adjust Let Windows Photo Gallery automatically improve the image Adjust exposure Control brightness and contrast Adjust color Change hue and saturation Crop picture Fix Redeye Slide 19

20 Digital Images More megapixels allows you to Enlarge image without losing quality Zoom in for more detail Optical zoom Physically adjusts lenses to zoom Same high quality image Digital zoom Lesser image quality Slide 20

21 Image File Size Use fewer megapixels for images on web pages or sent in Use max megapixels for high-quality printing of large images Increased file size means fewer photos can be stored in camera before downloading Slide 21

22 Memory Card Capacity 3 megapixels 5 megapixels 8 megapixels 128 MB memory card ~108 photos ~52 photos ~10 photos 256 MB memory card ~218 photos ~104 photos ~20 photos 512 MB memory card ~436 photos ~209 photos ~40 photos 1 GB memory card ~874 photos ~419 photos ~80 photos Slide 22

23 Computing History Milestones 1991 The World Wide Web debuted as a publicly available service on the internet Hypertext pages containing text, images, and links that could be immediately followed with a click Tim Berners-Lee, an English computer scientist and MIT professor, is credited with inventing the Web Under development from The internet is much older than the WWW Slide 23

24 Uses of the Internet Communication Blogs Instant messaging World Wide Web Websites provide information, allow search and sell products (e-commerce) Slide 24

25 Accessing the Internet ISP (internet service provider) Wired and wireless connections Wi-Fi or Bluetooth Web browsers are software that allows users the ability to view web pages Internet Explorer Firefox Safari Chrome Slide 25

26 Web Browser Popularity Slide 26

27 Web Browser Slide 27

28 Web Addresses URL (uniform resource locator) Addresses include domain names Slide 28

29 Browsing History A list of links for sites recently visited Slide 29

30 Favorites (Bookmarks) A list of links for sites Add websites Slide 30

31 Searching Search an individual website Web-based search engines Slide 31

32 Search Engine Popularity Lesson Slide 32

33 Search Tips Word stemming ski brings up skiing, skis, skier, skied Capitalization doesn t matter Phrase searching Use quotation marks: big cottonwood canyon Small or insignificant words are not searched and, I, it, the, or, and single digits like 1 or 7 Slide 33