INTRODUCTION TO INTERNET For Medical Professionals

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INTRODUCTION TO INTERNETFor Medical Professionals

• Dr. V.M. Shashidhar, MD
• Regional Laboratory Blood Bank
• DAMMAM.

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Introduction

• Internet is the highest achievement of man
• All information one needs from anywhere in the
  world is merely a keyboard away!.
• For medical Professionals it gives access to
  reference libraries, research materials, access
  journals, discussion with experts, tutorials,
  research, even job hunting all over the world!!
  All without geographical or other limitations.

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Internet - What is it
?

• Not an organization, place, or object.
• No body owns Internet, not even any Government.
  Virtual Global Society
• Internet is simply collection of thousands of
  interconnected small computer networks around the
  globe all using the same software protocol
  (FTP/IP) so as to exchange information uniformly
  easily.

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INTERNET
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Internet - What is it ?

• Efficient Cheapest way to communicate.
• No barriers regional, political or other.
• More than 20 million people are on internet.
• And is increasing tremendously every day!
• it is estimated that by year 2003 anyone with a
  telephone line will have Internet address?.

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Internet - Who manages it?

• Everyone is connected to everyone else..
• Network owners produce and sell access.
• ISOC - Internet Society - sets guidelines
• IAB - Internet Architecture Board - controls the
  standards.
• IETF - Internet Engineering Task Force. Voluntary
  organization.Improvements.

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History of Internet

• 1969 - US Defence dept. (ARPANET) at UCLA
  university.(IP protocol standard.)
• 1972 - National Sci. Foundation (NSFnet)
• 1989 - Commercial International Membership eg.
  Compuserve, ATT, etc)
• 1992 - Tim Berners Lee of CERN lab, Geneva -
  started World Wide Web.
• 1994 - Population explosion on net with many
  countries providing access.

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Internet - What Is In It for me ?

• Communication
• Information - !!
• News groups
• Research, Training,
• Shopping, selling
• Entertainment
• Many many more..!

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Internet - How to use it?

• Get membership - Institute , commercial
• Type of access Dialup, BBS, Direct Leased line
  (64k/128k), PSTN connections.
• Personal computer - any model, speed etc.
• Modem - high speed is better not essential.
• Telephone line - local access (no need for 0)
• TCP/IP transfer protocol (part of new OS).

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Internet
Servers computer
Any where around the world
Your computer
Telephone Line
Modem
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Terminology in Internet

• Infobahn - Information Super Highway
• Web, net, Cyberspace, Cybernetics, Netiquette,
  web, Web Surfing.
• Online - Means over the internet, while
  connected. (off line - is internet information
  when not connected).
• Home page First screen of information of a site.
  (hyperlinked to other pages)

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Components of Internet

• Email - Electronic Mail similar to ordinary mail
  (snail mail)
• Listservs - Listing Service (auto email).
• FTP - File Transfer Protocol, Telnet
• Usenet - New Groups - Forum of people with common
  interest share information.
• Gophers (go for) - Table of contenets
• WWW - World Wide Web - most popular (Graphic
  Interface using http html)

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WWW - World Wide Web

• Idea of Tim Berners Lee at CERN - European
  nuclear physics lab. 1991
• Graphical user interface with hyper links to
  other information both text, graphics, sound,
  video etc. starts at homepage
• Links takes us from one computer to another
  located on other side of globe without
  geographical limitation just by click of mouse!!
  (Reason for its popularity)

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Terminology in WWW

• HTTP - Hyper Text Transfer Protocol
• Graphical interface using special text which when
  clicked by mouse bring more information related
  to the text.
• Hyper Text have links to other pages located on
  the same computer or any other computer anywhere
  in the world. Links are also built into pictures
  and drawings for easy navigation. (Hypermedia)

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E-mail

• Electronic mail. Most popular, cheapest,
  efficient very very fast(few seconds!!)
• Everyone connected to internet gets automatically
  a E-mail address.
• Needs special software. Outlook express
• POP3, SMTP (post office protocols)
• Letter - software - packets - address - routed on
  internet - destination server - mail box - user

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Internet Addresses (URL)

• Uniform Resource Locators, or Internet addressess
  are unique combination of alphaneumeric
  characters and symbols.
• Email - name_inst_at_domain.service
• name User ID
• Domain is the Internet Service Provider
• service is abbreviation of type of service eg.
  Com-commercial, gov-Government etc.

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E-mail address - URL Valid all over the globe, no
place/country indication.
Name of the internet server
name_institute_at_domain .service
Type of the service. E.g. com - commercial gov -
government edu - educational net - network
User ID name
Institution (if part of a company)
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WWW address (URL)
Path symbol (forward slash)
Internet Service Provider (server)
http//www.domain.com/html2/..
Hyper Text Transfer protocol (ftp// gopher//)
World Wide Web server indicator
html homepage
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Internet Browsers

• Software Programs which give access to features
  of Internet including many utilities, email and
  search facility.
• Internet Explorer - Microsoft
• Netscape Navigator - Netscape Corp.
• Mosaic - Sun Microsystems

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Thank you..
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