### Instruction:
What does FAS, MTO and ATO stand for?

### Input:
Final Assembly Schedule, often abbreviated as FAS and sometimes referred to as finishing schedule, is a schedule of end items to finish the product for specific customer orders in a make to order (MTO) or assemble-to-order (ATO) environment.

### Response:
FAS = Final Assembly Schedule
MTO = make to order
ATO = assemble-to-order