Hash::Util (3pm)     - A selection of general-utility hash subroutines
List::Util (3pm)     - A selection of general-utility list subroutines
pthread_condattr_getclock (3p) - get and set the clock selection condition va...
pthread_condattr_setclock (3p) - get and set the clock selection condition va...
Scalar::Util (3pm)   - A selection of general-utility scalar subroutines