Wouldn't exactly call it capable, it had 20 memory registers and 106 bytes of programming memory. Plus Reverse Polish Notation is not exactly easy to use. Still great memories, so many kids of my generation discovered computers through those. I actually got one from eBay last year, cost me about $60 with 220->110 converter. I think somebody's selling unsold inventory from the factory. Printed out some old articles and went through first 2 legs of Kon-Tiki journey. Fun times :)