1. World Wide Web As the World Wide Web increased in popularity, it was difficult to keep track of all web addresses. Search engines were created to minimize the search effort for a specific website As the World Wide Web increased in popularity, it was difficult to keep track of all web addresses. Search engines were created to minimize the search effort for a specific website

2. Past Search Engines would count the amount of time a word would appear on a website. Search Engines would count the amount of time a word would appear on a website.

3. Present Google changed that. Instead, Google counts the number of links a site has. This gives the user a choice of more relevant sites. Google changed that. Instead, Google counts the number of links a site has. This gives the user a choice of more relevant sites.

4. Power The power of a search engine depends on the amount of web sites they have access to. Google claims to lead other search engines with 8 billion sites The power of a search engine depends on the amount of web sites they have access to. Google claims to lead other search engines with 8 billion sites

5. Search engines vs. Question- Answering engines Question-Answering engines try to answer a specific question directly. Question-Answering engines try to answer a specific question directly. It uses NLP or Natural Language Processing It uses NLP or Natural Language Processing

6. Eliza Program One of the first NLP machines One of the first NLP machines Simulated normal conversation patterns Simulated normal conversation patterns

7. Today’s leading QA engines: Ask Jeeves Ask Jeeves Start Start AnwerBus AnwerBus Brainboost Brainboost