2. Compare the effectiveness of different search engine (Select 3 to compare)

AltaVista
Scope
One of the largest and most comprehensive, indexing over 250 million Web pages. Scooter, the Web robot updates constantly. It is a full-text index that searches the entire HTML file.
AltaVista has three tabs for a simple search, an advanced search and the third for "Images, Audio & Video." Simple search may give results from four different sources. A Real Name System matches search terms against registered Web sites, brand names and advertising slogans. A Real Name address link is displayed above other hits and will link to a single match or short list of possible matches. (Do not use a plus or minus or field names which will disable results.) Ask Jeeves provides information from the answer service, relevant categories of Web sites as classified with Open Directory may appear, and the numbered listings from their Web crawler provide the bulk of the results. Advanced searching allows limiting your search by date, Boolean searching and proximity searches. Both simple and advanced searches let you limit to title or URL or even specific domain or Web site. You may specify a format field by entering a field name [title,URL, host and links e.g., anchor, applet, image or text] then a colon followed by the search terms.

Other services
Language capabilities include limiting Web searches to 25 listed languages including the recent addition of Japanese, Chinese and Korean language searching. Machine translation is available between English, French, Italian, Portuguese, German and Spanish. Three more specialty searches through options below the search box include "News" for major news stories between six hours to 14 days old; "Discussions" to scan newsgroups; and "Shopping" to match products with a wide range of Web merchants.

Results
The hit display shows title, URL, first two lines, date modified, size in bytes, and language. Only one page per Web site appears in the top results. Below each numbered listing you may see up to three links: "Translate" to translate into another language, "More pages from this site" and "Company factsheet" takes you to information about the company that owns the site. If your subject is broad a "Related Searches" features narrower aspects of the term at the top of the results page. AltaVista has made phrase searching automatic

HotBot
Scope
Slurp, the Web crawler, indexes about 110+ million sites. It provides a good collection of features in a single easy-to-use interface. Timely reindexing of sites provides more updated sites than other search engines.
Interface
A customizable forms-based single interface for simple searches lets you modify a search term from a drop-down list. Choose advanced search options and you have even more choices. You can limit the search to specific domains (such as .com or .org), geographic locations, very specific choices of media types and technologies, time periods and specified page depth. HotBot offers a language limit for nine languages, a personal page limit, and a check box for word stemming providing word variants of a search term.
Results
Relevancy of results is based on several factors: word frequency, number of times words appear in the title, document keywords and document length. Duplicate sites are listed with only one title, but all URLs are given. You may request search results in URLs only, brief description including title and summary, full description including title, summary, relevancy ranking and URL in increments of 10, 25, 50, or 100. Descriptions are pulled from tags or top headings. A list of the ten most-visited sites for your topic is shown. These top ten hits from Direct Hit are incorporated into the regular search results if the output is set to ten and there are results available from Direct Hit.

Lycos
Scope
A search engine with a longer existence than many, Lycos is keeping up by strong relevancy ranking capabilities and providing a mix of features. Top 5% sites with reviews as well as news, weather, sports, business and people searching, and immediate links to images and sound including MP3 compressed music audio files for downloading are provided. To supplement information accessed by search engines, Lycos has added its Invisible Web Catalog of more than 7,000 specialty search resources. Users can browse the listings or follow the links provided in search results for a topic. By clicking on a link one can access the information in databases that are invisible to search engines.
Interface
Lycos offers both a simple and an advanced search called Lycos Pro. This advanced interface includes numerous options to create and to modify the search logic. You can specify that results include the search terms in just the title, the URL or find either complete or partial terms within a specific Web site. Strategic use of proximity settings and frequency of words choices can refine a search. There are 15 languages that can be specified for searching. Included are Web guides to many popular subjects; for example, computers, careers, government, health, women, money and many others.
Results
Provides search results grouped by site but no option to ungroup the results. Does not report the total number of Web hits for a search. Provides URL, title and a brief summary. After the initial search you may click for various options: match categories from their subject directory as well as multimedia or book links, go to their matching categories Web Guide, refine the search or search within your hits.
Lycos...Lycosidae, the Wolf Spider, a cosmopolitan family of relatively large, active ground spiders that catch their prey by pursuit rather than in a web. Noted for their running speed, they are particularly active at night.

3. Use search engine to identify What you consider to be the five key issue and there solution in computer ethic.

INTERNET ETHICS

Introduction

The introduction of the World Wide Web in 1990 has catalyzed the expansion of the Internet, which is still growing today at unprecedented rates. The recent growth of the Internet has resulted not only in an increase in the amount of available knowledge, but in an increase in the problems inherent to its usage and distribution. It has become clear that traditional rules of conduct are not always applicable to this new medium, so new ethical codes are now being developed.
What is Ethics?
In my opinion, Ethics has little to do with law
Legal acts may be ethically "bad"
Illegal acts may be ethically sound

Ethics is based in cultures or subcultures.  Ethics is different from good taste . Ethics may or may not be related to intent.  Ethics is related to context .
Why do we need computer ethics?
the growth of the WWW has created several novel legal issues
the existence of new questions that older laws cannot answer
traditional laws are outdated/anachronistic in this world
a more coherent body of law is needed to govern Internet and computers

Ethics of great Concern
Three of the more pressing concerns on Internet/Computer ethics today are questions of copyright, privacy  censorship,email & authenticity. While on the other hand one must seriously consider the following areas of using Internet and the problem that we are facing due to them, they include

E-mail
Internet Relay Chat
Hackers
Authenticity, Ownership, and Commercialism of available matter over Internet.

Owenership/Copyright
It is widely known that producing photocopies of a textbook, for example, and distributing them to others is not lawful. Because authors of such literary works shall enjoy the exclusive right of authorizing the making available to the public copies of their works. In other words, no one but the author (or the owner of the copyright, as the case may be) has the right to make such copies of the work.
But what of computer programs in the form of software? Is software protected, just as literary works, from unlawful distribution? Yes! In fact, computer programs are protected exactly as literary works are protected. This means that the copyright privileges that literary and artistic works enjoy extend to computer programs as well. Therefore, only the owner of the copyright itself enjoys the exclusive right of authorizing the making available to the public of copies of the computer program in question.
As you have just seen, issues involving copyright laws and computers tend to become rather complex, so it is not at all surprising that so much controversy often arises in this novel area of computer ethics.

Censorship
There are things available on the internet that are fairly universally considered inappropriate or obscene. One reaction to these things, is that we should censor them. To censor something is to look at it more closely, in order to determine whether or not it is obscene, and most often to ban it if it is.
Currently, legal battles are being fought over many aspects of the internet and how closely it should be monitored. One debate right now centers around public and school libraries. Many libraries now have monitoring programs installed on their individual computers and networks. Some people believe that this a necessary protection - just as books like Playboy Collections are banned from libraries, so should some web pages.

Privacy
To discuss online privacy, there are a couple basic definitions to take into account. I'm sure that no matter how little time you have spent online, you have been asked if you would like to accept a cookie, or told that a cookie has been sent. Cookies are not quite that tangible nor delectable. A cookie is a piece of data that a web site collects about you when you visit. The data varies with the web site - a commercial web site will collect demographics (that is, sex, age, and other advertising information) to learn more about you, while an e-mail service may collect identifying or personal (name, mailing address) information to recognize you. Cookies allow a web site to be tailor made for you as long as you stay in that domain name or each time you visit. An CGI or JavaScript code in the beginning of the web page you visit instructs you browser to send certain information to a server. If you have ever checked a box saying "Remember My Password", you have set a cookie.

Email
Many people have been tricked my e-mail scams, claiming that they will make you a millionaire. It is the same sort of pyramid scheme that exists over telephone or mail, but no laws covered it for a while. Also, many email chain letters have allowed urban legends to spread at an accelerated rate and created alarm over hoaxes concerning many food and drug products. These emails only bog down email systems and servers, but do not seem to be ending. Some advertisers also email unsolisisted ads to email users, in a practice known as spamming.

Authenticity

An example will show the controversial aspects of the Authentic material. With the appearance of MPEG-1 Audio Layer 3 (more commonly known as MP3) digital files just a few years ago, audio digital files are now freely available for users to download. Songs available in MP3 format can be found at various sites on the web, and by simply downloading these files, users have free access to recordings they would have had to purchase beforehand. MP3 files, that is, are digital copies of actual music recordings. The records avaialble on most of the site are not authentic and recoreded in some one else voice. Its another Ethical threat that is due to authenticity of available material on Internet.
 

Refrences:
gopher://spinaltap.micro.umn.edu/00/computer/Ethics/
http://www. cas.usf.edu/english/walker/mla.html
http://www.nmp.umt.edu/TRIO/Ethics/ethics/tsld007.htm
http://www.ethics.ubc.ca/resources/computer/topics.html
http://www.sims.berkeley.edu/impact/Fall95/ethics.html
http://magi.com/~mmelick/it96jan.htm
http://sunsite.berkeley.edu/InternetIndex/
http://www.lib.berkeley.edu/Web4Lib/archive/9604/0103.html
And Major Search Engines Discussed Above.

Search Engine Information
Beaucoup, www.beaucoup/engbig.html
Media Metrix, www.mediametrix.com
Search Engine Watch, www.searchenginewatch.com
SeekHelp.com, www.seekhelp.com
University of California at Berkeley Library: Internet Resources, www.lib.berkeley.edu/teachingLib/guides/Internet
Meta-Search Engines,
www.lib.berkeley.edu/TeachingLib/Guides/Internet/MetaSearch.html
 

Good sites
http://www.cora.justresearch.com/
http://library.thinkquest.org/
http://essays.hostme.com/