A method of displaying contact method on a mobile device includes storing a plurality of contact records on a mobile device. Example hydraulic vitrectomy probes may include a pressure multiplier that is operable to output a hydraulic pressure at a multiple of a received pneumatic pressure. The cabinet comprises a commodity vending opening, which is located at an upper region, and a commodity accommodating section, which is located within the cabinet and accommodates a plurality of commodities laid-up on commodity carriers.