What does HEO stand for?

B & M Metal Products, Asotin, WA - Manufacturer code for watercraft hull identification number (USCG)

Hanford Environmental Oversight (SAUS)

Herold - NCIC firearms make code (NCIC)

High Earth Orbit (IEEE)

High Elliptical Orbit Satellite

High-Energy Orbit - NASA (NASA)

Higher Executive Officer - Civil service - British

Higher Executive Order

Highest Elected Official (SAUS)

High Farth Orbit (SAUS)

Highly Eccentric Orbit (ACAE)

Highly Elliptical Orbit (SAUS)