Project Management Body of Knowledge, the abbreviation PMBOK is used. It is an internationally recognized standard of project management, published by Institute of PMI (Project Management Institute). In addition, the Institute also publishes other standards focused on project management and provides project management certification program. PMBOK was changed in 1996 to the guide called A Guide to the Project Management Body of Knowledge, abbreviated PMBOK Guide. Though, the abbreviation PMBOK is used. The standard is the most widespread in the USA.
Among the other standards and methodologies, PMBOK is the oldest and most general. Its width it is trying to describe all aspects of project management. PMBOK is divided into 9 basic knowledge areas, which together form a model of project management. PMBOK is primarily focused on companies supplying their goods/services through projects.