| Acronym | Definition |
|---|
| HAS | Houston Airport System |
| HAS | Home Automation Systems |
| HAS | Haute Autorité de Santé (French: High Authority for Health) |
| HAS | Highest Average Salary (employee benefits) |
| HAS | Hour Angle of the Sun |
| HAS | Humanitarian Air Service (UN) |
| HAS | Hospital Accreditation Standards |
| HAS | High Speed Arithmetic (package) |
| HAS | Helicopter Antisubmarine Squadron |
| HAS | Hardened Aircraft Shelter |
| HAS | Hot Air Sauna |
| HAS | Horatio Alger Society |
| HAS | Hit Avoidance System |
| HAS | Hogere Agrarische School (Netherlands) |
| HAS | High Availability Subsystem |
| HAS | Hyper Amorphous Silicon (TFT LCD) |
| HAS | Hydraulic Actuator System |
| HAS | Homeland Air Security |
| HAS | Hrvatski Atletski Savez (Croatian Athletic Federation) |
| HAS | Heartland Apicultural Society |
| HAS | Hydrometeorological Analysis and Support |
| HAS | HCO Area Secretary (Scientology) |
| HAS | Hanford Analytical Services |
| HAS | Healing Arts Society (former group at Worcester Polytechnic Institute) |
| HAS | Horticultural Art Society |
| HAS | Hellenic Actuarial Society |
| HAS | High Angle Strafe |
| HAS | Headed Anchor Studs (construction) |
| HaS | Human-As-Sensor (military) |
| HAS | Higher, Adjacent, Supporting (USMC) |
| HAS | Hyperion Sensor Assembly |
| HAS | Hand-Off AT&T Switch |
| HAS | Holding Action System |
| HAS | Headquarters Application System |
| HAS | Helleniki Aeroporia Stratu (Greek Army) |
| HAS | Homatropine 5% Eyedrops (ophthalmology) |
| HAS | Human Audio Sponge (band) |
| HAS | Height-Adjustable Stand (product feature) |
| HAS | Home and School Association |