| Tie::Array | base class for tied arrays | Tie::RefHash | use references as hash keys |
| Tie::DBI | Tie hashes to DBI relational databases | Tie::StdHandle | base class definitions for tied handles |
| Tie::ExtraHash | base class definitions for tied hashes | Tie::StdScalar | base class definitions for tied scalars |
| Tie::File | Access the lines of a disk file via a Perl array | Tie::SubstrHash | Fixed-table-size, fixed-key-length hashing |
| Tie::Memoize | add data to hash when needed | Tie::Watch | place watchpoints on Perl variables. |
| Tie::RDBM | Tie hashes to relational databases |