RPN-67 SD!

A dream calculator of the 70s, priced at $1,900 in todays dollars, now on your iPhone RPN-67 SD is the iPhone version of RPN-67 Pro, the first complete simulation of Hewlett-Packards legendary HP-67 programmable calculator for the iPad. Produced from 1976 to 1982, the HP-67 was a huge success among scientists, engineers and other professionals. For more information and free program downloads visit the RPN-67 website: cuveesoft.ch/rpn67