_all : Table holds all the information about different operating units. Multi-Org environment. You can also set the client_info to specific operating unit to see the data specific to that operating unit only.

_TL : Translation Tables. where we can find the name of the particular field we are referring to. All _TL tables has a unique ID which corresponds the foreign key to other table which is used to store in the database and referenced back to display the name.

_V: are views.

_vl table stores the MultiLingual views