The OMB-Tempbook-66 data acquisition system (DAS) adds voltage and thermocouple measurement capability to notebook PCs for portable test applications and provides an alternative to plug-in boards for desktop PCs. The system provides 12-bit 100 kHz data acquisition and data transfer to a PC via an enhanced parallel port interface or PCMCIA link. The unit can also connect to a standard parallel port with slightly slower transfer rates. It has a built in analog capability that permits it to measure eight differential or 16 single-ended channels. Input types include mV signals, voltage signals and direct thermocouple input without any additional signal conditioning.