the moscow metro uses magnetic cards for tickets with a certain number of rides: 1,2,5,10,20 and 60. these tickets were first sold in 1993 as a test. all other tickets are transport cards (smartcards). there are two kinds of smartcards, 'unlimited' and 'social'. both kinds of cards can be used for 30, 90 or 1 year. social cards are free for senior citizens and reduced for students.