The Datum card encoding systems can be used to apply data to magnetic stripe or contact chip cards. They have been designed specifically to produce ISO specification cards although non-ISO data configurations may be made on request. Both systems may also be fitted with a single line ink jet printing head to identify cards after they have been encoded with either a serial number or other data. Cards that fail the encoding process are automatically rejected by the system and the data can then be optional encoded onto the next available card, keeping the sequence complete. The ME2 features separate write and read heads to ensure data integrity within the magnetic stripe whilst the EN2 features a separate data subsystem for encoding to many different chip types and protocols.