Comment by eru

I'm not sure whether 'file' necessarily has to refer to the 'Unix' view of a 'sequence of bytes'? Or just 'some organisational unit of information'? Ie like the stuff you would put into a filing cabinet?

The 'sequence of bytes' view is just one specific level of abstraction. It's not what's actually on disk because of things like compression, encryption and fragmentation.

Database schemas are a different level of abstraction.