What does EUI stand for?

Electronic Unit Injector - or Injection - Automotive Engineering

Enciclopedia Universal Illustrada, Espasa - A publication

End-User Interface - Computer science (AGLO)

Enemy Unit Identification - Military

Energy Utilization Index (SAUS)

Engineering Update Institute - Commercial firm

Epson Ltd (EFIS)

Euravia - Spain - ICAO designator (FAAC)

European University Institute - Florence, Italy (AIE)

extended user interface (SAUS)

Island Boats, Jeanerette, LA - Manufacturer code for watercraft hull identification number (USCG)

SAIT - Southern Alberta Institute of Technology Library Technician Program - UTLAS symbol