Analgesia and anesthesia: etymology and literary history of related Greek words.

An electronic-component supplying system including electronic-component supplying cartridges each of which supplies each of electronic components, a support table to which the cartridges are attachable and which has a support surface for supporting the cartridges attached to the support table, a positioning device which positions each cartridge attached to the support table, on the support surface, and a preventing device which prevents each cartridge attached to the support table, from moving apart from the support surface, the positioning device including one or more first positioning projections provided on one of the support table and each cartridge, one or more first positioning grooves provided on the other of the support table and each cartridge, such that the first positioning groove extends in a first direction and is engageable with the first positioning projection to position the first positioning projection in a second direction perpendicular to the first direction while permitting the first positioning projection to be moved relative thereto in the first direction, and a stopper which defines a limit of movement of each cartridge relative to the support table in the first direction.