The Hewlett Packard 35900A Dual Channel Interface is a dual-channel run buffered interface that connects analytical instruments to data systems. It converts the analog signal from analytical instruments to digital data and transmits it to the host computer for further processing. Unit uses Modular Input/Output (MIO) for host communications. MIO is a standard designed to allow for maximum flexibility in peripheral to host communications. The MIO slot is located on the rear panel for plug-in MIO cards. The TCP/IP LAN MIO card connects the 35900 to the networked data systems. The GPIB/RS-232 MIO card connects the data systems using the GPIB functionality.