I got an IBM ThinkPad 500 sub-notebook as a high school graduation present in 1994. There is no documentation of it today. A different laptop is recorded as the

I got an IBM ThinkPad 500 sub-notebook as a high school graduation present in 1994. There is no documentation of it today. A different laptop is recorded as the ThinkPad 500. Mine had a 486slc-2 50 processor and 4 MB RAM that I later upgraded to 12 MB. I think they were closeouts IBM decided not to mass produce.