Abstract: A robotic tool changing system which is compatible with manipulators (20) of the type having a pair of opposable vise-like end-effector "fingers" (22,24) formed on an end-effector (21) is disclosed which may be used to grip and manipulate a wide range of different tools (42,44,45) and wherein the end-effector (21) includes: (i) alignment ports (29,30,34,35) formed on the gripping fingers (22,24) for reception of alignment pins (29',30',34',35') formed on the tools (42,44,45); (ii) a resistor (R1) embedded within each tool (42,44,45) which is uniquely representative of that tool; (iii) a tool comparator circuit (50) having at least one reference resistor (R2) for enabling identification of the particular tool gripped by the end-effector (21) and for generating a control output signal capable of selecting, defining and enabling and requisite utility(ies) and utility control line(s) required for proper operation of the gripped tool; (iv) electrical contact means (31,32) formed in at least one finger (22) for coo