What does QUI stand for?

Aero Quimmco SA de CV - Mexico - ICAO designator (FAAC)

Quadratic Upstream Implicit (SAUS)

Queen's University, Ireland

Quileute - Language code (ETLW)

Quincy Railroad Co. - Later, QRR - AAR code

Quirindi - New South Wales - Airport symbol (AD)

Quito - Ecuador - Seismograph station code, US Geological Survey - Closed (SEIS)

Quito, Ecuador, Tracking Station - NASA (NASA)

Thomas Crane Public Library, Quincy, MA - OCLC symbol (OCLC)