Origin of "second system effect" before 1975?

[Shoppa, Tim]

I know of two publications in 1975 that used the term "second system effect" or "second-systemitis".

1: Brooks' _Mythical Man-Month_.
2: Bell's and Streeker's "What We Learned From the PDP-11".

Does anyone know of earlier usage of this term or earlier names for this effect, possibly outside of computers?

Tim.