Systems

1. The set of correlated principles, ideas, or statements belonging to some department of knowledge or belief;
   
2. A department of knowledge or belief considered as an organized whole
   
3. A connected and regularly arranged scheme of the whole of some subject
   
4. A comprehensive body of doctrines, conclusions, speculations, or theses
   
   

• D20
  
• AmberDiceless
  
• WhiteWolf
  
• Nobilis?
  
• ArsMagica
  
• OwnSystems