What does SIQ stand for?

Sick in Quarters

Singkep Island - Indonesia - Airport symbol (AD)

Social Intelligence Quotient - In book title

Sonia - Language code (ETLW)

Student Interests Quarterly - A publication

Suicidal Ideation Questionnaire (TES)

Superior Internal Quality (WDAA)

Symptom Interpretation Questionnaire - Medicine (DMAA)