This document discusses key concepts related to real estate finance and contracts, including the two main contracts in a mortgage (the note and mortgage/deed of trust), different types of mortgage rates and payments, prepayment penalties, recourse vs. non-recourse loans, foreclosure, and the time value of money principles of present value, internal rate of return, and net present value. Key terms covered include adjustable rate mortgages, balloon payments, deficiency judgments, power of sale foreclosures, and the order of priority for lien holders.