What does SIOP stand for?

What does SIOP mean?

SIOP	Sheltered Instruction Observation Protocol Community » Educational
SIOP	International Society of Paediatric Oncology Medical » Oncology
SIOP	Single Integrated Operational Plan Governmental » Military
SIOP	Society For Industrial And Organizational Psychology Miscellaneous » Unclassified
SIOP	Scalable I O Project Miscellaneous » Unclassified
SIOP	Society for Industrial & Organizational Psychology Business » Professional Organizations
SIOP	Sales Inventory and Operations Plan Business » General
SIOP	International Society of Paediatric Oncology Business » Professional Organizations