What do the three systems of tourism industry certification mean?

ISO9000 quality management system

ISO 14000 environmental management system

OSHMS 18000 occupational safety and health management system

Web O9000 standard is a concept put forward by the International Organization for Standardization (ISO) in 1994, which means "an international standard formulated by ISO/TC 176(ISO Technical Committee for Quality Management and Quality Assurance).

ф o140000 is an international standard of environmental management system formulated by the International Organization for Standardization (ISO).

OSHMS 18000 is a modern international safety management model that rose in the late 1980s.