Academic suffix or abbreviated compound element, used after a field name to mean a doctoral degree or doctor in that field, as in 工博 or 理博. It is much less conversational than the full word 博士.
Suffix or abbreviated compound element in names of expositions and fairs, often corresponding to a shortened form of 博覧会. Compound readings may include sound changes, such as 万博 read ばんぱく.
