Acronyms 

OCG
OSTC Certification Group
ODP
Open Distributed Processing
OIML
International Organization of Legal Metrology
OIW
OSI Implementors’ Workshop (within NIST)
OJEU
Official Journal of the European Union (formerly known as OJEC)
ON
Ă–sterreichisches Normungsinstitut (National Member for Austria)
ONC
Organisme National de Certification (National Certification Organization)
ONH
Organisme National Habilité (National Authorized Institution)
ONS
Organisme National de Surveillance (National Supervising Inspectorate)
ORGALIME
European federation of national industrial associations representing the European mechanical, electrical,                electronic and metal articles industries
OSI
Open Systems Interconnection
OSITOP
Open Systems Interconnection/Technical and Office Protocols (user association)
OSTC
Open Systems Testing Consortium (Agreement Group)
OTL
OSI Testing Liaison (ECITC)
OV
Order Voucher