External references that ASCB considers authoritative. ISO The International Organization for Standardization publishes the international standards referenced throughout this Resource Center, including the ISO/IEC 17000 series that governs conformity assessment and accreditation. Use iso.org to check the scope and current edition of a standard or to obtain its full text.iso.org IRQAO The International Register of Quality Assessed Organisations is an independent register and validation service on which certificates issued by accredited certification bodies and training providers are recorded, so their current status can be checked. Use it to verify a certificate or an individual training record.irqao.com