Complete List of SAP Modules

Financial Applications
  FI Financial Accounting
  CO Controlling
  EC Enterprise Controlling
  IM Investment Management
  PS Project System

Human Resources
  PA Personnel Administration
  PT Personnel Time Management
  PY Payroll

Logistics Applications
  SD Sales and Distribution
  MM Materials Management
  PP Production Planning and Control
  LE Logistics Execution
  QM Quality Management
  CS Customer Service