SearchSaving Throws
Every character has certain immunities, which can be categorised and used as mechanics. Whenever some effect threatens your character, these immunities and resistances are checked. For instance, halflings are highly resistant to poison, and so attempts to poison halflings will usually be met with failure. Saving throws remain hidden to players, by and large, although hints as to different races' strengths and weaknesses can be seen in the various race help files.