| packages/nixpkgs/perl538Packages.AltCryptRSABigInt | RSA public-key cryptosystem, using Math::BigInt |
| packages/nixpkgs/perl538Packages.TieRefHash | Use references as hash keys |
| packages/nixpkgs/perl538Packages.TieRegexpHash | Use regular expressions as hash keys |
| packages/nixpkgs/perl538Packages.DirManifest | Treat a directory and a manifest file as a hash/dictionary of keys to texts or blobs |
| packages/nixpkgs/perl538Packages.PerlCriticPolicyVariablesProhibitLoopOnHash | Don't write loops on hashes, only on keys and values of hashes |