IPSUR is a textbook written for an undergraduate course in probability and statistics. The approximate prerequisites are two or three semesters of calculus and some linear algebra in a few places. Attendees of the class typically include mathematics, engineering, and computer science majors.

IPSUR is FREE, in the GNU sense of the word. Hard copies of the first edition are available for purchase from Lulu. It is usually cheaper to download an electronic copy and print it out yourself.

IPSUR development has been happening on and off since 2006, yet there are many important topics, examples, and exercises still missing from the book. I will add them as time permits.