What does HPB stand for?

GC Industries Inc., Norco, CA - Manufacturer code for watercraft hull identification number (USCG)

Handmaids of the Precious Blood - Roman Catholic religious order

Hand-Printed Books

Harbor Patrol Boat

Health Canada, Health Protection Branch (SAUO)

Health Protection Branch (SAUS)

Helena Petrovna Blavatsky - Famous 19th-century occultist

Hepatobiliary - Medicine (DMAA)

Hermann Professional Building (SAUS)

High Police Band (SAUS)

High-Probability Behavior

Hinged Plotting Board

Honeywell Precision Barometer - Automotive electronics

Hooper Bay - Alaska - Airport symbol (OAG)