全景圖,自由系統與專有系統
自由系統是開放且免費的，您現在及未來都可以不受限制地使用它們。這是一項重要優勢，因為若專有系統的擁有者改變政策，例如開始向所有使用者或講師收取高額費用，以允許他們繼續使用基於專有內容所建立的成果，那麼對該專有系統的投入就可能付諸流水。
Intellectual property statements:
PRINCE2®, MSP®, and MoP® are registered trademarks of AXELOS Limited.
PMBOK® is a registered trademark of the Project Management Institute, Inc.
APM BoK is a mark of Association for Project Management.
PM² is the property of the European Union.
ICB (Individual Competence Baseline) is the property of International Project Management Association (IPMA®)
DSDM® is a registered trademark of Agile Business Consortium Limited.
LeSS is the property of The LeSS Company B.V.
SAFe® is a registered trademark of Scaled Agile, Inc.
GTD® is a registered trademark of David Allen Company.