This document defines key terms related to credit and credit cards, including finance charges, interest rates, credit card companies, credit ratings, benefits and problems of using credit, formulas for calculating interest, credit applications, and consumer protection laws like the Truth in Lending Law and Fair Credit Billing Act. It provides information on fees charged by credit cards, how credit card companies make money, factors that affect credit scores, examples of major credit card companies, what constitutes a good or bad credit score, potential advantages and disadvantages of using credit, how to calculate interest, what information is included in a credit application, and consumer rights under truth in lending and fair credit billing laws.