Data One GmbH is a provider of products and services such as software, computer aided software engineering (case),software, computer aided software testing (cast),software, utilities,software, business process management (bpm),software, geographical optimisation of vehicle fleets,software, import-export applications,software for credit cards and smart cards, payment authorisation and transaction,software for personal digital assistants (pda),software, voice message,software, biometric recognition,software, communications network management,software, network management.