The design of all information-gathering exercises where variation is present, whether under the full control of the experimenter or not.

singular of experience points

(role-playing games) A system of points when a predetermined amount is accumulated by a player character, causes them to level up. This is one of the core mechanics of many role-playing games. Abbreviations: EXP or XP.

Do not be surprised by unusual events. Anything might happen.

(software compilation) The replacement by a compiler of a function call with a copy of the entire function body, sometimes used as an optimization.

plural of expert system

(computing) A slot for additional hardware, cards, etc. for the purpose of expanding a computer system.

plural of expansion slot

(parapsychology) An experience in which one feels outside of one’s body.

(construction) A structural separation between two building elements that allows free movement between the elements without damage to the system.