Bidding box for home-played games. Use of bidding boxes has several advantages over oral bidding: it reduces noise in the room, prevents bidding being overheard at neighboring tables, allows easier review of the auction, and reduces the opportunity to pass unauthorized information to one's partner (intentionally or not) by the manner and intonation in which one makes one's bid. A bidding box is typically a plastic box with two slots, each containing a set of bidding cards. One slot contains 35 cards with symbols of bids (5 denominations—clubs (), diamonds (), hearts (), spades (), and notrump (NT)—in seven levels of bidding,
Spectrum auction there are none left or there are no buyers. In other words, bidding continues round after round, until a round occurs in which all bidder activity ceases. That round becomes the closing round of the auction. Information about anonymous bidding can be found under the section “Information Procedures During the Auction Process” within the FCC’s Public Notice for any particular auction. For example, the established procedures for the FCC’s 2018 5G Spectrum Auction 101 state that information to be made public after each round of bidding will include, for each license, the number of bidders that placed a bid on