| DBI | TBD::Locker | locking operations | |
| TBD::CachingTable | implementation of all accessing operations on base of a cache | TBD::NIS | physical representation of tables as NIS maps |
| TBD::DBI | support of tables of relational databases | TBD::Scanner | a general scanning algorithm for tables |
| TBD::Dumper | a general dumping algorithm for tables | TBD::Text | physical representation of tables as ordinary text files |