He is one of the survivors of the Nazi extermination process in Auschuwitz. The story is told in his point of view.
Google is a search engine that finds information that is related to the specific topic of what you are searching.
Subject directory is a classified web pages in an organized set of categories.
Reservations in this context could mean doubts, such as 'My mom had reservations about going out to shop."
This means that their mom was not sure if she wanted to go shopping or not because she has reasons not to.