This may be a bit of an old allusion, but Lotus Notes is a great example of this. Notes is fundamentally a programmable, non-relational, client/server replicated database with a UI on top of it. It's a workflow engine for accomplishing whatever business processes a company might have that can be made to keep working pretty well when the client computer is offline. It can be anything.
But it is remembered first and foremost as an email system, a feature that's fairly trivial to implement once you have a replicated database and a UI on top of it that can display lists and text. But it had to be an email system first because you can't sell something that can do anything if it doesn't do anything.
But it is remembered first and foremost as an email system, a feature that's fairly trivial to implement once you have a replicated database and a UI on top of it that can display lists and text. But it had to be an email system first because you can't sell something that can do anything if it doesn't do anything.