Credit bureaus collect data about people and companies regarding how well they pay their bills. The credit reporting concept started in the mid-1800s but was a very local process and functioned as more of a warning against lending money or selling goods on credit to individuals who had a history of not paying in a timely manner. However, around World War I, people were able to move more easily and the need for national reporting agencies started to be come apparent. Today, the three main credit bureaus are Experian, Equifax and TransUnion. Though...