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APTIS was the Accountancy and Passenger Ticket Issuing System used on the British Rail/National Rail until 2007. It was originally called "Advanced Passenger Ticket Issuing System" as it was being developed at the time of the Advanced Passenger Train.

It was widely known as the All-Purpose Ticket-Issuing System, a description which was used during the development of the prototype devices.

It led to the introduction, on the national railway, of a new standardised machine-printable ticket, the APTIS ticket, which replaced the Edmondson railway ticket first introduced in the 1840s.