Below mentioned is SAP Functional Modules list which is part of SAP modules list:

SAP FI module: FI stands for Financial Accounting.
SAP CO module: CO stands for Controlling.
SAP CRM module: CRM stands for Customer Relationship Management.
SAP CS module: CS stands for Customer Service.
SAP EC module: EC stands for Enterprise Controlling.
SAP EHS module: EHS stands for Environment, Health & Safety.
SAP FM module: FM stands for Fleet Management.
SAP FSCM module: FSCM stands for Financial Supply Chain Management.
SAP HR module: HR stands for Human Resources.
SAP IM module: IM stands for Investment Management.
SAP MM module: MM stands for Materials Management .
SAP PLM module: PLM stands for Product Life Cycle Management.
SAP PM module: PM stands for Plant Maintenance.
SAP PP module: PP stands for Production Planning.
SAP Product Costing: Product Costing deals with Plan Costing + Actual Costing of Finish products.
SAP PS module: PS stands for Project Systems.
SAP QM module: QM stands for Quality Management.
SAP RE module: RE stands for Real Estate.
SAP SD module: SD stands for Sales and Distribution.
SAP SM module: SM stands for Service Management.
SAP TR module: TR stands for Treasury.
SAP WM module: WM stands for Warehouse Management.
SAP LO module: LO stands for Logistics General.

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