A Guide to the Project Management Body of Knowledge (PMBOK Guide) is a book which presents a set of standard terminology and guidelines for project management. The Project Management Institute (PMI) is a not-for-profit professional organization for the project management profession with the purpose of advancing project management.
The Guide recognizes 47 processes that fall into five basic process groups and ten knowledge areas that are typical of most projects, most of the time.
PMBOK five process groups
Monitoring and Controlling
PMBOK ten knowledge areas
Project Integration Management
Project Scope Management
Project Time Management
Project Cost Management
Project Quality Management
Project Human Resource Management
Project Communications Management
Project Risk Management
Project Procurement Management
Project Stakeholders Management (added in 5th edition)
Each of the ten knowledge areas contains the processes that need to be accomplished within its discipline in order to achieve effective project management.