Re: [math-fun] German is easier than I thought it was

Wikipedia suggests back "as far as 1955 at IBM". A Google books search has it in a 1959 Virginia Librarian with the attribution: "Sign near a computer at AEC facility, Los Alamos, New Mexico".

On May 26, 2016, at 12:09 PM, Allan Wechsler <acwacw@gmail.com> wrote:

Versions of this go back to the late sixties, at least.