IAAS

IAAS can refer to the following:

• International Association for Astronomical Studies, a youth astronomy and aerospace research group based out of Denver, Colorado with a 40+ year history of success in the youth STEM fields.

• Incorporated Association of Architects and Surveyors, former name of the British professional body Association of Building Engineers
• International Association for Shell and Spatial Structures
• Institute of Agriculture and Animal Science, institute of Tribhuvan University, Nepal
• International Association of Students in Agricultural and Related Sciences, Belgium-based international organisation
• Independent Academies Assured Services

• Infrastructure as a service, a cloud computing service model
• Indian Audits and Accounts Service, an Indian Civil Service