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 view the results of each round. The FCC auctions have used a Simultaneous Multiple Round Auction (SMRA, also referred to as the Simultaneous Ascending Auction) in which groups of related licenses are auctioned simultaneously over many rounds of bidding. At the start of each round, bidders simultaneously make sealed bids for any licenses in which they are interested. When the bidding for the round has concluded, round results are posted, which include the identities of the new bids and bidders along with the standing high bid and the corresponding bidder. The initial standing high bid at the start of an