The Wayback Machine is a digital archive of the World Wide Web and other information on the Internet created by the Internet Archive, a nonprofit organization, based in San Francisco, California, United States. It was set up by Brewster Kahle and Bruce Gilliat, and is maintained with content from Alexa Internet. The service enables users to see archived versions of web pages across time, which the archive calls a "three dimensional index." 

Since 1996, they have been archiving cached pages of web sites onto their large cluster of Linux nodes. They revisit sites every few weeks or months and archive a new version if the content has changed. Sites can also be captured on the fly by visitors who are offered a link to do so. The intent is to capture and archive content that otherwise would be lost whenever a site is changed or closed down. Their grand vision is to archive the entire Internet. QUESTIONS:

Q1:
1. Who put up the Wayback Machine?
2. Who constructed the Wayback Machine?
3. 
Q2:
1. Who were the two people who constructed the Wayback Machine?
2. By whom was the Wayback Machine set up?
3. 
Q3:
1. At what period did Brewster and Bruce start filing cached pages?
2. In what year did Brewster and Bruce start filing cached pages?
3. 
Q4:
1. What is the purpose of the Wayback Machine?
2. What is the aim of the Wayback Machine?
3. 
Q5:
1. What does the Wayback Machine do?
2. What is the Wayback Machine’s purpose?
3. 
Q6:
1. Which state is the Machine located in?
2. In what area is the Wayback Machine located?
3. 
Q7:
1. What does the service permit?
2. What is enabled by the service?
3. 
Q8:
1. On what type of hardware are the archives kept?
2. On what kind of equipment are archived the cached pages?
3. 
Q9:
1. What is the main goal of the project?
2. What is the ultimate desire of the project?
3. 
Q10:
1. How many times are sites re explored?
2. How frequently are sites revisited?
3. 
Q11:
1. Who else can access to sites on the fly?
2. Who else can capture sites on the spot?
3. 
Q12:
1. What subject matter is the Wayback Machine maintained with?
2. What content is the Wayback Machine kept with?
3. 
Q13:
1. What is the use of a "three dimensional index."?
2. What is the purpose of a "three dimensional index."?
3. 
Q14:
1. Who is the sister of Brewster Kahle?
2. Which person is Brewster Kahle’s sister?
3. 
