Robert's Rules of Order, often simply referred to as Robert's Rules, is a manual of parliamentary procedure by U.S. Army officer Henry Martyn Robert. "The object of Rules of Order is to assist an assembly to accomplish the work for which it was designed [...] Where there is no law [...] there is the least of real liberty." The term Robert's Rules of Order is also used more generically to refer to any of the more recent editions, by various editors and authors, based on any of Robert's original editions, and the term is used more generically in the United States to refer to parliamentary procedure. It was written primarily to help guide voluntary associations in their operations of governance.

Parliamentary procedures are the accepted rules, ethics, and customs governing meetings of an assembly or organization. Their object is to allow orderly deliberation upon questions of interest to the organization and thus to arrive at the sense or the will of the majority of the assembly upon these questions. Self-governing organizations follow parliamentary procedure to debate and reach group decisions, usually by vote, with the least possible friction.