An intrinsically-safe handheld field maintenance tool comprising: a wired process communication module configured to communicate with a field device in accordance with a process industry communication protocol; at least one wireless process communication module; a secondary wireless communication protocol module; a controller coupled to the wired process communication module, the at least one wireless process communication module and the secondary wireless communication protocol module, the controller being configured to provide at least one function related to maintenance of the field device; program instructions embodied on a computer readable medium coupled to the controller, the program instructions causing the controller, when executed by the controller, to create a wireless communications channel with: - a host CMMS/EAM software module located away from the intrinsically-safe handheld field maintenance tool to provide computerized maintenance management systems, CMMS, functionality, wherein information obtained from the field device is uploaded directly to a CMMS/EAM host software system and - an ERP host system to display inventory relative to the field device and/or components or subsystems thereof, wherein information obtained from the field device is used to query or access an enterprise software host located remotely; wherein the CMMS functionality includes automatically: - associating a field device identifier of the field device with an asset number for which a work order is being executed, - presenting the work order and associated instructions documented in this work order and - obtaining information from the field device in accordance with the specification set forth by this work order. a wired process communication module configured to communicate with a field device in accordance with a process industry communication protocol; at least one wireless process communication module; a secondary wireless communication protocol module; a controller coupled to the wired process communication module, the at least one wireless process communication module and the secondary wireless communication protocol module, the controller being configured to provide at least one function related to maintenance of the field device; program instructions embodied on a computer readable medium coupled to the controller, the program instructions causing the controller, when executed by the controller, to create a wireless communications channel with: - a host CMMS/EAM software module located away from the intrinsically-safe handheld field maintenance tool to provide computerized maintenance management systems, CMMS, functionality, wherein information obtained from the field device is uploaded directly to a CMMS/EAM host software system and - an ERP host system to display inventory relative to the field device and/or components or subsystems thereof, wherein information obtained from the field device is used to query or access an enterprise software host located remotely; - a host CMMS/EAM software module located away from the intrinsically-safe handheld field maintenance tool to provide computerized maintenance management systems, CMMS, functionality, wherein information obtained from the field device is uploaded directly to a CMMS/EAM host software system and - an ERP host system to display inventory relative to the field device and/or components or subsystems thereof, wherein information obtained from the field device is used to query or access an enterprise software host located remotely; wherein the CMMS functionality includes automatically: - associating a field device identifier of the field device with an asset number for which a work order is being executed, - presenting the work order and associated instructions documented in this work order and - obtaining information from the field device in accordance with the specification set forth by this work order. - associating a field device identifier of the field device with an asset number for which a work order is being executed, - presenting the work order and associated instructions documented in this work order and - obtaining information from the field device in accordance with the specification set forth by this work order.