SIU meaning in Airport Code ?

Answer: What is Siuna mean?

Siuna is a county-sized administrative municipality in Nicaragua, located approximately 318 kilometres (198 mi) northeast of the capital city of Managua and 218 kilometres (135 mi) west of the coastal city and regional capital Puerto Cabezas in the North Caribbean Autonomous Region (RACN). Siuna is the name of the city as well as the municipality. The municipality of Siuna contains 204 rural communities and 20 neighborhoods. Most were settled in support of gold mining along the Ei River drainage basin, leading to rapid population growth from the mid-1930s.

reference

Full Form	Category
Southern Illinois University	Academic & Science
International Society of Urology	Academic & Science
Société Internationale d'Urologie	Academic & Science
Siuna	Airport Code
Scheduling Information Unsolicited	Business
Seafarers International Union	Business
Seiko Instruments USA, Inc.	Business
Sirius Telecommunications Ltd	Business
Serious Incident Unit	Community
Subscriber Interface Unit	Computer and Networking
Sensor Interface Unit	Computer Hardware
System Interface Unit	Computing
Station Interface Unit	Computing
Source Interface Unit	Computing
Shelf Interface Unit	Electronics
Shake It Up	General
Saab Information Unit	General
Supplementary Indicators to Unemployment	General
Special Infiltration Unit	General
Significant Industrial User	General
Special Investigative Units	General
Special Investigative Unit	General
Skin Installer Ultimate	General
Specialized Intervention Unit	General
System Identification Utility	General
Special Investigations Unit	Governmental
Special Investigation Unit	Governmental
SINGUR	Indian Railway Station
Slave In Utero	International
Shut It Up	Internet
Stimulus Isolation Unit	Medical
Simulation Interface Unit	Military and Defence
Signal Interface Unit	Space Science