The Blue Team Club System - Description of a complex bidding system invented in Italy. A major part of the information is in downloadable files only. Bilingual site (Italian/English). The L System - An original bridge bidding system presented by Hong Liu, based on very light openings. M.A.F. - The Ultimate Bridge Bidding System - A scientific bidding system from the Netherlands (5-card majors and different two-suiter openings). Bilingual site gives information in English and Dutch. Bidding Quest - Practice bidding on prepared deals with scores. Compare and check how other pairs have bid same boards. Try bidding competition with anonymous partner. The Diamond Major - Forcing club, 5-card major, medium notrump system. The Chilli Bidding System - Gives priority to simplicity and universality of rules. Bridge Guys - Lists and defines a large number of systems and conventions. Bridge Files - Offers a collection of different systems, a list of conventions and information about the game and its players. Inquiry 2/1 GF - Online book presenting the author's variation of this popular north American system. Bridge Conventions - Presents an list of explanations and definitions. SA-YC Simplified - This bidding system is a simplified version (as played on OKBridge) of the Standard Yellow Card (SA-YC) system of the ACBL (American Contract Bridge League). Its essential features include the strong no-trump, 5-card major and weak 2 openings. Discussing the Law of Total Tricks - Three-time world champion Mike Lawrence of the USA and bridge theoretician Anders Wirgren of Sweden offer proof that the number of trumps is a poor guide to the number of tricks. Includes information on the book, "I Fought the Law of Total Tricks." The WEB Bidding System - Worldwide Easy Bridge is a simple bidding system presented by Etienne Turpin. Bridge Is It - Concerned with bridge bidding systems, especially CLONE, based on a forcing weak/strong 1 club opening. Also features links to other bridge resources, particularly on bidding systems. Bilingual site (English/Norwegian). REGRESsion - Modification of the bidding system Regres, based on frequent openings with weak hands and opening passes with strong hands. The Acol Bridge Pages - Presents an Acol bidding discussion as well as play and defense agreements. Includes a Windows freeware program, WolfBridge.