PNC-5000 was their first machine.... like in 1994 or so. It was good in its day, but that is truly outdated technology and support is probably non-existent. If you haven't bought the machine, I would strongly advise against buying it. If you already have it and can't find cartridges, I think you might want to consider biting the bullet and looking into replacing it with something more recent as far as software and parts.... not top mention quality. By the way, the 50 and 5000 series used a bigger case then the 60 and 600's.