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Paper

Description

History

Lee DeForest's description of the audio (aka triode)

Edwin Armstrong's account of how the audion really worked

Black's original paper on negative feedback

Edwin Armstrong's original paper on FM

Harry Nyquist's original paper, the key so understanding DSP

Paper by Claud Shannon the father of information theory

A fascinating history of Guglielmo Marconi by G A Isted, who was his personal assistant, seeing to all working for the Marconi Co. from 1923 - 1969

Python

Comprehensive introduction to python for scientific computing

Python is a brilliant free alternative to Matlab