First stage – College of Medicine – University of Mosul
\ Nineveh
Computer-Lecture 13 / 2015-2016
Maha al ani
1
Search Engines
The search engine: A program that searches
information on the World Wide Web by looking for specific
keywords and return a list of information found on that topic. As example to
the search engine:
Search engines do not really search the World Wide Web directly. Each
one searches a database of web pages that it has harvested and cached.
When you use a search engine, you are always searching a somewhat
stale copy of the real web page. When you click on links provided in a
search engine's search results, you retrieve the current version of the page.
Each search engine has its own algorithm for finding information. They are
classified into:
Human editors: engines that use people to classify web sites into
categories.
Automated crawlers: engines, which read web pages and store
the text. Search engine databases are selected and built by computer
robot programs called spiders. These "crawl" the web, finding pages for
potential inclusion by following the links in the pages they already have
in their database.
Meta: Engines send the users query to other search engines.And
their databases of web pages, within a few seconds, you get back
results from all the search engines queried. Meta-search engines do not
own a database of Web pages; they send your search terms to the
databases maintained by search engine companies. Meta-Searchers
Still Smarter.
Pop-Up Blocking
Pop-Ups are annoying little windows or messages that pop-up when you
visit certain sites. They are used for marketing purposes.
1. Click the tools menu, select Pop-up Blocker.
2. Select turn on Pop-up blocker.
First stage – College of Medicine – University of Mosul
\ Nineveh
Computer-Lecture 13 / 2015-2016
Maha al ani
2
Online Encyclopedias
There are many online sites that contain encyclopedias. The most
common encyclopedia site is Wikipedia.org
1. Log in to the site encyclopedia
2. The page for the web site will appear.
Online Dictionaries
The internet contains many online dictionaries, such as:
http://translate.reference.com/
Social networking:
It is websites allow users to be part of a virtual
community. The two most popular sites are currently Face book and
Twitter ,
and recently Google+ these websites also provide an
important linking element between users that allows friends to
communicate directly with each other. Because people often have
First stage – College of Medicine – University of Mosul
\ Nineveh
Computer-Lecture 13 / 2015-2016
Maha al ani
3
friends from different places and different times in their
lives, social networking sites provide an opportunity to
keep in touch with old friends and to meet new people as
well.
Voice over Internet Protocol (VoIP)
(VoIP) means hardware and software that enable people to use the
internet as the transmission medium for telephone calls by sending
voice data in packets using IP (Internet Protocol) rather than using
traditional circuit transmissions.
One advantage of VoIP is that the telephone calls over the internet do not
incur a surcharge beyond what the user is paying for internet access, in the
same way that the user does not pay for sending individual e-mails over the
internet. There are many internet applications available such as Viber,
Tango, Talkray, Skype is a VoIP app and service that allows you to send
free text messages, make free voice calls.
Opening a Web Page within a New Tab
To open a web page within a new tab do the following:
1. Right click on a hyperlink.
2. From the submenu displayed click Open In a New tab.
The hyperlink web page will appear within a new tab.
First stage – College of Medicine – University of Mosul
\ Nineveh
Computer-Lecture 13 / 2015-2016
Maha al ani
4
Opening a Web Page within a New Window
To open a web page within a new window, do the
following:
1. Right click on a hyperlink.
2. From the submenu displayed click Open in a New Window.
3. Two windows of the internet explorer will appear. One displays the
original page while the seconds displays the hyperlink web page.
Manage and delete your browsing history
Internet Explorer keeps track of all the websites you have visited in the past,
as long as the history hasn't been cleared or deleted to free up disk space on your
computer. The Internet Explorer history makes it easier for users who have
decided to revisit websites if they haven't been bookmarked or to return to
websites they may have forgotten the address. browsing history is the
information that Internet Explorer remembers and stores on a PC as your browse
the web. This includes info you've entered into forms, passwords, and sites you've
visited, and it helps make your browsing experience better. If you're using a
shared or public PC, you might not want to Internet Explorer to remember your
browsing data.
First stage – College of Medicine – University of Mosul
\ Nineveh
Computer-Lecture 13 / 2015-2016
Maha al ani
5
To delete your browsing history in the desktop
1. Open the desktop, and then tap or click the
Internet Explorer icon on the taskbar.
2. Tap or click the Tools button
, and then tap or click Internet options.
3. Under Browsing history, click Delete.
4. Select the types of data you want to remove from your PC, and then click
Delete.
To delete your browsing history when you close browsing sessions
You can set Internet Explorer to delete your history each time you close a
browsing session as the following.
1. Open the desktop, and then click the Internet Explorer icon on the taskbar.
2. Click the Tools button
, and then click Internet options.
3. Under Browsing history, select the Delete browsing history on exit check
box, click Apply button and then click OK.