Right, It was a drum machine. Actually it was before my time also. We
had a IBM 1410 40k for normal processing and the actuaries used the 650.
We wrote in autocoder for the 1410. It was amazing how much program you
could put in 40k.

Jeff Morris wrote:

Jr Gilbreath wrote:

Sound like a 650 to me and you probably used fortran.
JR

Was that the one with the drum memory, so programming it efficiently
meant understanding how much the drum went around during each
instruction? Fortunately that was a bit before my time.

My first programming was on a 1620 in 1963, but it wasn't state of the
art then- it was more like a glorified card reader with Fortran
programed in with a punch board. I independently derived the "Bubble
Sort" on that machine!