- Accelerated Cost Recovery System
- Bretton Woods System
- British Imperial System
- European Monetary System
- Federal Catalog System
- Federal Farm Credit System
- Federal Home Loan Bank System
- Federal Reserve System
- Federal Reserve Check Collection System
- Imperial System
- Inter-Market Trading System
- Intermediate Credit Banks System
- Management Scientific Information System
- Marketing Analysis Research System
- Material Product System
- Planning, Programming and Budgeting System
- Post Office Saving System
- Selected Acquisition, Information and Management System
- Taylor System
- Weir System