An existing Princeton Applied Research Model 131 data acquisition system was modified by adding an inexpensive IMSAI 8048 microcomputer to increase the data transmission speed by a factor of fifty. The system was then interfaced to a PDP 11 minicomputer. The system, microcomputer, minicomputer, interfaces, and communication programs are described. The network enables on‐line data acquisition and analysis, facilitating the work in experiments in which large amounts of accurate data are needed.