[dejv]

One company where I worked decade ago have tables numbered, like tbl01_users or tbl14_places.

Still have no idea why they establish it this way.

[jacquesm]

Likely because it tied into a data dictionary from a documentation system.

The tbl01 makes it unique (so you can have a users and someone else can have theirs too), the data dictionary then tells you what fields exist in that particular table and how those fields relate to other tables.