Jargon

Geoffrey K. Pullum:

What's more, the remarkably annoying female voice that tells you needlessly that the doors are closing and that the train is about to start moving says "Transit is departing."

(...)

I wish I understood the strange compulsion that makes people in the transportation industry reach for technical words that nobody uses in ordinary conversation: board for "get on" is one example, since very few people say "I boarded the bus" for "I got on the bus," but clearer examples include depart for "leave", and disembark or deplane or alight for "get off". These are really very rare in conversation. Why does the transportation industry feel they must be used nonetheless?

This applies to all user interactions. Use words your users understand easily. Avoid industry jargon they may not be familiar with.