    Sentence 1: What present-day ‘company. did  BankAmericard tum into?    Sentence 2: After a troubled gestation during  which its creator resigned, BankAmericard  went on to become the first successful credit  card; that is, a financial instrument that was  usable dcross.a large number of merchants  and.also allowed cardholders to revolve a  balance (earlier financial products could do  oné or the other but not both).    