- ACTB stands for Actin, Beta
- ACTB stands for Advanced Chemical Technology Building (University of Illinois at Chicago)
- ACTB stands for AIDS Committee of Thunder Bay (now AIDS Thunder Bay; Canada)
- ACTB stands for Albany County Tourism Board (Laramie, WY)
- ACTB stands for Aviation Combat Test Branch (Marine Corps Operational Test & Evaluation Activity)
Abbreviations And Their Meaning