Apparatus and method whereby a first digital computer system may be controlled by a second digital computer system. The two digital computer systems are connected by data transfer apparatus. A program in the second digital computer system constructs a call protocol specifying a routine to be called in...http://www.google.co.uk/patents/US4882674?utm_source=gb-gplus-sharePatent US4882674 - Apparatus and method for control of one computer system by another computer system
