B          Encode    IPC       SDBM_File XS      
ByteLoader Errno     List      Safe      attrs   
Cwd        Fcntl     MIME      Socket    re      
DB_File    File      NDBM_File Storable  threads 
Data       Filter    ODBM_File Sys       util    
Devel      GDBM_File Opcode    Thread    
Digest     I18N      POSIX     Time      
DynaLoader IO        PerlIO    Unicode