A smart interface assembly is provided which enables convenient, instant, and discreet communication between an analytical meter and a computer, the transfer of data from the analytical system, and/or the provision of interface software for the display or analysis of data. The smart interface assembly includes first and second couplings for interfacing with the personal computer and the analytical meter. The smart interface assembly has processing and memory capabilities facilitating displaying test results from an analytical system on a computer. The interface can also function as a storage device allowing transfer, access, or syncing of data from a diagnostic system to or by the personal computer without the need for special drivers, and also can facilitate communications between the diagnostic system and the computer using standard device drivers likely to be already present on the computer.