Search Engines Wayne Shirley Part 2 of lesson 1: INTRODUCTION TO THE INTERNET InformationTechnologySITCourse:3601 To insert your company logo on this slide From the Insert Menu Select “Picture” Locate your logo file Click OK To resize the logo Click anywhere inside the logo. The boxes that appear outside the logo are known as “resize handles.” Use these to resize the object. If you hold down the shift key before using the resize handles, you will maintain the proportions of the object you wish to resize.

Search Engines: YahooExciteLycosInfoseek AltavistaInktomiWeb Crawler

1) Those that Sort and Categorise and sometimes include reviews or comments e.g. YAHOO. 2) Robotically-built index types such as LYCOS, INFOSEEK, EXCITE and WEB CRAWLER. The Robotic types(CRAWLERS) use special programs called trawler, crawler, spider, robot, wanderer, worm or similar name that scouts around the Web and returns its findings. Information, such as each page’s location, title and amount of text (which varies between crawlers) are then stored on a publicly accessible searchable database.

This search engines are probably the best place to start for any serious search. Web Crawlers generally search for key words contained in a document. This indicates that your search results depend on how much information a search engine records when it gathers data from sites around the world. By entering ambiguous (non-specific) keywords to do your search you can end up wading through hundreds of irrelevant responses. The trick is to NARROW DOWN THE SEARCH! This can be achieved by using specific tools.

Help! All search engines offer assistance with a guide or tutorial to the more advanced tools for narrowing down your search. It is very wise to take time to read these guides and tutorials as an unfocussed search can be a very time consuming and wearisome process. “Quotation Marks”: By surrounding your words with quotation marks your search will return results that have those words in exactly the same order.

For example: To find the ABC’s homepage you might enter “Australian Broadcasting Commission” rather than radio or television.

+ sign: A + sign before a word means not only does the document have to contain previously indicated word(s), it must also contain this word, but not necessarily next to the other one or even in the same paragraph. E.g: “Australian Broadcasting Commission” + policy - narrows your search down further by indicating that you wish to view pages with the ABC’s policies. Excluding the + sign indicates that you would prefer the document to have that word but it is not essential. Don’t forget to use the online help specific to the use of your search engine

Archie is one of the oldest file-search systems. It periodically logs in to FTP (File Transfer Protocol) servers, copies the public directory listings, and then indexes the results. The results are then stored in a searchable database and made available on-line through an Archie Server. When you enter a search request, Archie scans its database and returns a list of files expressed as FTP addresses.