| G05KBF | Initialise seeds of a given generator for random number generating routines (that pass seeds expicitly) to give a repeatable sequence |
| G05KCF | Initialise seeds of a given generator for random number generating routines (that pass seeds expicitly) to give non-repeatable sequence |
| G05ZAF | Selects either the basic generator or the Wichmann–Hill generator for those routines using internal communication |