DC Carry Chain

This document is a technical schematic titled 'DC Carry Chain S181' produced by Digital Equipment Corporation in 1965. It details the circuitry, including transistors (Q1 through Q7), various resistors, and diodes. The document includes a comprehensive parts list with reference designations, descriptions, and corresponding part numbers, as well as a transistor and diode conversion chart for components such as the DEC3639B, D662, and D664.