1. LIBS 100 11 May 2005 Finish with email Essential Computing Concepts

2. 2 Moving mail into a folder Select a message Hold down the left button and drag the message into the folder Try it: move the email from me into the folder you created student emails

3. 3 Attaching a file to an email message Create a new message Find the “test.txt” file you saved to your NAS drive area Send it as an attachment to yourself (you should have your name in your contacts list now)

4. 4 Sending an Attachment In a new message, click “Attachments” Click on “Browse” Select a file Select “Open” Click “Attach” then “Close”

5. 5 Viewing an Attachment Click on the attachment “Save” saves attachment to your computer “Open” opens it right away Open the attachment you just received

6. Essential Computing Concepts Computer Basics

7. 7 Objectives Describe components of a computer system Define microprocessor, memory, and auxiliary storage Describe a digital camera

8. 8 Memory Central processing unit (CPU) Input Auxiliary Storage Auxiliary Storage Auxiliary Storage Output Any Computer System

9. 9 The IBM PC A combined effort between IBM (credibility and marketing), Microsoft (operating system), and Intel (microprocessor); introduced in 1981 The PC was created as an ‘open’ machine enabling independent contractors to develop hardware and/or software to improve it PC clones quickly followed and the market soon exploded; IBM has a fraction of the market it created

10. 10 The PC Today

11. 11 Inside the PC On Off All computers are based on the binary number system A bit or binary digit has one of two values, zero or one A byte is the smallest addressable unit of memory (8 bits) ASCII provides for 256 (or 2 8 ) characters  01000001 – A  01000010 – B  etc.

12. 12 The central processing unit (cpu) or “brain” of the PC Original chips were numbered  8086, 80286, 80386, 80486 Pentium is an Intel trademark Clock speed (MHz or GHz) differentiates chips  higher number = faster processing speed The Microprocessor

13. 13 Megs, Gigs, etc. Clock speed determines how many instructions per second the microprocessor can execute. A MHz = megahertz; one million cycles/second GHz = gigahertz; one billion cycles/second

14. 14 Random Access Memory (RAM) Transient (erased when power turned off) Measured in bytes  1 Kilobyte = 2 10 characters (~1,000 bytes)  1 Megabyte = 2 20 characters (~1,000,000 bytes)  1 Gigabyte = 2 30 characters (~1,000,000,000 bytes) Need 256Mb or 512Mb of RAM  Keep multiple programs & data files in memory  Graphic-intensive programs demand a lot of memory

15. 15 Auxiliary Storage Floppy Disk  No longer standard Hard (fixed) disk  30 Gb and higher Removable storage  CD-R/CD-RW  DVD/DVD-R/DVD-RW  Zip disks  Thumb/jump drives  Tape

16. 16 Input Devices

17. 17 The Monitor Resolution is expressed in picture elements or pixels; (800 x 600 or 1024 x 768) The higher the resolution, the more you can see at one time. Larger monitors enable you to you run at higher resolutions; e.g., 19” to run 1024 x 768 comfortably A graphics card speeds processing

18. 18 Lower Resolution (800 x 600) Displays 20 rows and 8 columns

19. 19 Higher Resolution (1024 x 768) Displays 28 rows and 12 columns

20. 20 The Printer Ink Jet  Today’s entry level Laser  Top-of-the line Four-in-one functionality  Printer, scanner, fax, copier Network printer

21. 21 The Digital Camera An image is stored on a photosensitive computer chip, which converts the image to a series of pixels  3 megapixels is now entry-level  4+ megapixels common There is no film; images are stored in memory; the more memory the more pictures  64Mb to 128Mb is suggested

22. 22 Internet Began as ARPA (Advanced Research Projects Agency) after Soviets launched Sputink in 1957 US Government and Universities adopted ARPANET in the 1970’s and 1980’s to share information. ARPANET is a series of connected computer networks

23. 23 World Wide Web Tim Berners-Lee created HTTP as a way of interacting with the Internet. The World Wide Web (www) allowed people to find and share data on the Internet. Browsers were created to permit ease of access and file sharing.  Mosaic  Netscape Navigator

24. 24 The Internet and World Wide Web The Internet  Massive network of networks  Began in 1969 as a government project  Original network had 4 computers  Connects millions of computers together globally The World Wide Web  Way to access info. over the internet  Invented by Tim Berners Lee who wanted to share academic information  Uses HTTP protocol to transmit data, allow apps to function and exchange business logic

25. 25 A message travels the Internet All that matters is the beginning and ending address

26. 26 What is a Web browser? Software app that allows users to locate and display Web pages Common browsers:  Internet Explorer  Netscape Navigator  Mozilla  *Firefox*

27. 27 Acronyms Abound HTTP – HyperText Transfer Protocol is used to transmit Web documents HTTPS – Secure protocol for confidential transactions HTML – The language in which all Web documents are displayed TCP/IP – A suite of protocols that allows multiple platforms to communicate ISP – Internet Service Provider

28. 28 Important terms to remember Icon - small picture that represents an object or program. Mouseover - An element that triggers a change in an item when the pointer passes over it. www.vl.bryantstratton.edu

29. 29 Summary Understand components of a computer system for usage Begin familiarity with common acronyms and terms Think about computer as tool for information gathering

30. 30 References Grauer, Robert and Maryann Barber. Essential Computing Concepts. New Jersey: Person Prentice Hall, 2004. Internet Pioneers. http://www.ibiblio.org/pioneers/index.html Webopedia. http://www.webopedia.com/TERM/H/HTTP.html