As with spades, bridge is a team trick-taking game, and there is bidding on the number of tricks to be taken, but with a selected trump suit, rather than a fixed one. However, only the team that wins the bidding has to make the number of tricks they claimed + 6. The other team tries to stop them from doing so. The bidding is won by the team which makes the final (and therefore highest) bid, before there are three consecutive passes (excluding doubles and re-doubles, which do not change the bid strength, or the team that made the bid). Bid strength is based first on the number bid between 1 and 7, and then the trump suit selected, in the order of Clubs, Diamonds, Hearts, Spades, and No Trumps. The player on the team who wins the bid who first bid the trump suit is the declarer, and their partner is the Dummy. Card play begins with the player to the left of the Declarer, and continues clockwise, with the Declarer controlling the Dummy's card plays. Players must play cards in the suit of the first card played for that trick, unless they lack such cards. In that event, they may play from any other suit. The strongest card (aces are high) in the suit played wins, unless a trump card has been played, in which case the strongest trump card wins. Whoever wins a trick goes first next. The teams score points based on the final bid, and the number of tricks they made.
There should be a couple of threads in the Sens-o-Tape archive, from when SC ran the game.