 On the APTIS, PORTIS/SPORTIS and other computerised ticket issuing systems, a "status code" field is provided on each ticket issued.This is left blank if an adult is travelling at full (undiscounted) fare; but if any discount or other special condition applies, a code of up to five letters appears.When APTIS and PORTIS (the predecessor of SPORTIS) were introduced, from late 1986, the Railcard was named "Senior Citizen Railcard", and a status code of SNRCZ was used to identify a ticket bought with the Railcard.