This Stearns accomplished by using a “condenser”; and further he developed a system of “duplexing” the line similar to the principle of the Wheatstone bridge.

The recording of redundant data for fault tolerant operation. Data are written on two separate disks within the same system. Each disk drive is connected to its own controller. See disk mirroring ...

A communications technique that simulates full-duplex transmission in a half-duplex line by turning the line around very quickly. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction ...