The digital computer has become a valuable tool for monitoring critically ill patients. Large computer systems, e.g., the time-shared system ( 1) at the Latter-Day Saints Hospital, offer the advantages of (1) base of programming, (2) central record keeping, (3) flexibility and (4) computing capability; whereas small dedicated computers offer the advantages of (1) simplicity, (2) stand-alone capability, and (3) reliability. This paper describes a system which uses a small computer (PDP-8) in conjunction with a large time-shared computer (CDC-3200) for automation of blood analysis in the pediatric intensive care unit of the Primary Children's Hospital in Salt Lake City.