If instead of a computer revolution in the 1950’s to 1990’s, there had been a steam locomotive train revolution instead, what might psychology look like today?

If instead of a computer revolution in the 1950’s to 1990’s, there had been a steam locomotive train revolution instead, what might psychology look like today? (Use APA format as citation please)
There is no actual requirement for the number of sources, but at least give two or more. (400~ 800 words, double-spaced, front 12)