Actor-Based Concurrent Language, family of programming languages from Japan in the 1980s-1990s
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Atlantic Collegiate Baseball League, a baseball league located in the Mid-Atlantic region of the United States
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American Contract Bridge League, the largest bridge organization in North America
In 2012 the American Contract Bridge League (ACBL) named Osofsky and Barbara Seagram as being joint holders of number 40 of the 52 most influential personalities in the organization's history for their work at promoting friendly behavior at the bridge table.
Besides the Bridge Bulletin, other ACBL publications include the Laws of Duplicate Bridge (named Laws of Duplicate Contract Bridge until 2008), the ACBL Bridge Series of lessons for beginners, and free instructional software.
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The ACBL has also published the ACBL Bridge Series, a series of books written by Audrey Grant and designed to teach the game to beginners, as well as to help more experienced players review and expand upon their knowledge of the game.
Under the rules of the sponsoring organization (for example national federations such as American Contract Bridge League (ACBL) and the English Bridge Union (EBU), zonal organizations, and the World Bridge Federation (WBF)), certain conventions are alertable, the partner of the player making the conventional call must say "alert" (or show an alert card from the bidding box) before the right-hand opponent calls.
At the international level, competitions and point awards are administered by the World Bridge Federation (WBF); its affiliates at the multi-national level, such as the American Contract Bridge League (ACBL), also issue points as do more local organisations such as the English Bridge Union (EBU), and the Deutsche Bridge Verband (DBV) and independent ones such as the American Bridge Association (ABA).
The event was inaugurated in 1994 and is named in honor of Ruth McConnell, former treasurer for the World Bridge Federation (WBF) and former president of the American Contract Bridge League (ACBL).
A bridge champion in his native Romania in the early 1970s, Ştefan Ralescu has published many bridge articles that have appeared in The Bridge World, the ACBL Bulletin and Bridge Today, among other magazines.
The trophy for the contest, named in memory of ACBL Hall of Fame member and former bridge editor of The New York Times Alan Truscott, was put into play in 2006 by the United States Playing Card Company.