- JU – (s) Juan de Nova Island (FIPS 10-4 territory code)
- JUGFET – (p) JUnction Gate Field-Effect Transistor
- JUICE – (p) JUpiter ICy Moon Explorer
- JUO – (i) Joint Urban Operations
Read more about this topic: List Of Acronyms And Initialisms: J
Read more about this topic: List Of Acronyms And Initialisms: J