MathSciNet is an electronic publication offering access to a database of reviews, abstracts and bibliographic information for much of the mathematical sciences literature. Here one can find references to articles on probability, stochastic processes, combinatorics, etc. It contains over 2 million items and over 1 million direct links to original articles. It is an electronic version of Mathematical Reviews which began publication in 1940. It uses the Mathematics Subject Classification to categorize materials by subject. The database can be searched by author, title, MSC subject category, review text, etc. To find published sources on a topic, one can either use the MSC subject categories or search key words in the title and review text. The review is a paragraph summary of the source, but not all sources have reviews or summaries.