12 Bit Latching Relays Module

This document is an Engineering Change Order (ECO) log for the M802 12-bit Latching Relays module used in PDP-8 and PDP-11 systems. It outlines five specific modifications (M802-00001 through M802-0003B) made between 1970 and 1972 to address hardware issues including excessive loading, noise from relay switching, and timing problems in the single-shot circuit.