- AETR stands for European Agreement Concerning the Work of Crews of Vehicles Engaged in International Road Transport
- AETR stands for Average Effective Tax Rate
- AETR stands for Accord Européen sur les Transports Routiers (French: European Agreement on Road Transport; EU)
- AETR stands for Advanced Epithermal Thorium Reactor
- AETR stands for Advanced Engineering Test Reactor
- AETR stands for Americans for Educational Testing Reform
AETR