A biometric system for obtaining a biometric enrolment measurement is described. When in a closed configuration, the case has generally semi-cylindrical sidewalls which intersect in generally quarter-spherical corners. A browser specific cascading style sheet corresponding to the identified browser is determined. The OCR system determines if the alphanumeric series and the matching series of characters extracted from the machine-readable code comprise any discrepancies and corrects the alphanumeric series of characters.