With regards to Interbase...what are defined as Users?

Are users deemed to be the developers that integrate with the database and
have most 'practical' interaction with it.

Or are users the users of the software (i.e. Customers) that is integrated
with the database, and have least 'practical' interaction with it?

By 'practical' I mean hands on, working with the database as opposed to
using a piece of software which works with the database for you.

Cheers,

Andy