SNAPI is a system that allows a visually impaired user to record their preferences onto asmart card or othersecurity token.[1]
When a card,mobile phone, key fob token or similar portable object containing SNAPI data is put into public or shared IT equipment, or moved into the field of the equipment's sensor, it informs theterminal about the user's preferreduser interface.[2] The terminal could be a sharedpersonal computer, a publickiosk, aticket machine, aturnstile or anautomated teller machine (ATM). This can enable variousaccessibility modes such as a high-contrastdisplay or increasedtypeface size, audible prompts, or increased time for responses for the duration of the transaction. When the transaction is complete, the terminal returns to itsdefault settings.[2]
The coding is specified in the European standard EN 1332–4.[3] The Local Authority Smartcard Standards e-Organisation(LASSeO) has supported the inclusion of SNAPI coding in various UK local authority smart card schemes.[4]