Most likely they didn't have a VAX in the same building they could do that with, so they had to improvise. These things were pretty big and expensive (https://e

Most likely they didn't have a VAX in the same building they could do that with, so they had to improvise. These things were pretty big and expensive (https://en.wikipedia.org/wiki/VAX#/media/File:VAX_11-780_intero.jpg https://en.wikipedia.org/wiki/VAX#/media/File:VAX_11-780_int...)!