“The San Diego mayor’s office accepts the use of some marijuana vending machines, according to a major manufacturer of the drug-dispensing devices. Though the company’s automated dispensing machine resembles typical vending machines, it differs in key ways. The touch-screen Canna MedBox can only be accessed via a special pre-paid card and fingerprint scan. The machine is also armored to prevent thefts and keeps a record of every transaction.”
http://www.rawstory.com/rs/2013/03/26/san-diego-mayor-ok-with-some-marijuana-vending-machines/