When I worked at Morgan Stanley, which owned Discover card, our corporate cards were, of course, Discover cards. They also assigned us Amex cards in case we wer

When I worked at Morgan Stanley, which owned Discover card, our corporate cards were, of course, Discover cards. They also assigned us Amex cards in case we were somewhere that didn't take Discover cards. And also Visa cards, in case we were somewhere that didn't take Amex cards.