Extensions for financial services (XFS) interface specification - Release 3.0. PIN keypad device class interface. Migration from version 2.0 (see CWA 13449) to version 3.0. Programmer's reference

Extensions for financial services (XFS) interface specification - Release 3.0. PIN keypad device class interface. Migration from version 2.0 (see CWA 13449) to version 3.0. Programmer's reference

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