Question 1 A pregnant woman collapsed into hepatic coma, the surgeon contacted a medical library. He needed immediate information on blood transfusions from the blood banks. Using a computer terminal and a retrieval program, the librarian searched more than half a million documents in just a few minutes. The necessary information was given to the surgeon and the patient recovered fully.

(a) Describe the best retrieval program that can be used in the above scenario. Illustrate how the program can be used.