I think it was mentioned in chat a couple of times, but this is a pretty interesting language called HAL/S (High-order Assembly Language / Shuttle) that was used in the Space Shuttle program.
One statement can take up multiple lines (a^2 and b_i^2):
E 2 2 M X = A + B S I
An example from one of the instruction manuals:
There are some manuals here:
Sometimes I wonder how much of the code we write will someday end up in space. I think at some point we should chip in a little money into a pool and make it happen one way or another.