Turing's Pre-War Analog Computers

https://docdro.id/1lAk3mX

I found it from here (the author's site I believe):

https://m.tau.ac.il/~corry/publications/articles/pdf/LCTurin...

Please use the first link, as I am not sure if the author's site can take the strain (mods, if this is a problem, edit as needed - my apologies).

Here's a Wayback Machine copy: https://web.archive.org/web/20190412084542/https://cacm.acm....

Both are paywalled.