Transcript World Wide Web

World Wide
Web
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World
Wide
Web
WEB BROWSERS
• A web browser is the software program
you use to access the World Wide Web,
the graphical portion of the Internet.
• The first browser, called NCSA Mosaic,
was developed at the National Center for
Supercomputing Applications in the early
1990s.
• The easy-to-use point-and-click interface
helped popularize the Web, although few
could then imagine the explosive growth
that would soon occur.
TOP THREE
• Although many different browsers are available,
Microsoft Internet Explorer, Firefox and
Netscape Navigator (a distant third) are the
most popular. (Many Mac users prefer the Safari
browser.)
• At one time, Netscape (now owned by AOL) and
Microsoft put so much money into their browsers
that competitors found it hard to keep up. The
battle between the two companies to dominate
the market led to continual improvements to the
software. Version 5.0 and later releases of either
browser are excellent choices. (By the way, both
are based on NCSA Mosaic.)
Browser Anatomy
• When you first launch your web browser,
usually by double-clicking on the icon on
your desktop, a predefined web page
appears. This page is referred to as your
home page or start page.
The Toolbar
• The row of buttons at the top of your
browser, known as the toolbar, helps you
travel through the web of possibilities,
keeping track of where you've been. Since
the toolbars for Internet Explorer, Firefox
and Navigator, differ slightly, we'll first
describe what the buttons in common do.
• The Back button (the arrow pointing to the left)
returns you the previous web page you've
visited.
• Use the Forward button to return to the page
you just came from.
• Home takes you to whichever home page
you've chosen. (If you haven't selected one, it
will return you to the default home page, usually
the Microsoft, Netscape or Google website.)
• Reload or Refresh does just that, loads the web
page again. Why would you want to do this?
Sometimes all of the elements of a web page
haven't loaded the first time, because the file
transfer was interrupted.
• Print lets you make a hard copy of the current page
loaded in your browser.
• The Stop button stops the browser from loading the
current page.
• Search connects to directories and search tools on the
Microsoft, Netscape or Google websites.
• Bookmarks or Favorites lets you can record the
addresses of websites you want to revisit. Once you add
a URL to your list, you can return to that web page
simply by clicking on the link in your list, instead of
retyping the entire address.
• The Address Bar Next to the toolbar, you will see a long
box. This is where you type the address or URL of a
website you want to visit. After you enter it, press the
Return or Enter key to access the site or click on the
"Go" or Arrow button to the right of the address box.
• The Uniform Resource Locator (URL) is the address of
a Web site. URLs for Web pages begin with the code
http:// ("http" stands for hypertext transfer protocol).
Add to your book
• Page about the world wide web and
browsers
• Include screen prints of a browers, label
the parts
• These can take one or two pages