Schrödinger Equation — Scientific computing on the IBM PC/AT
Back in the early 1980s, there was only one way to do scientific computing: the Mainframe Computer. And so it seemed to be a small revolution to use a Personal Computer (PC) to do complex calculations. The top PC in 1986 was the model PC/AT made by IBM, with 640 KB main memory, 20 MB hard disk, and DOS 3 as operating system. Graphical or window-oriented user interfaces were unknown at that time. But after all, a FORTRAN compiler for scientific computing was available. And believe it or not, this equipment was adequate to numerically solve a partial differential equation like the time-dependent Schrödinger equation for a moving particle. If you are curious how this could be done, follow the links below.