Frog doing math on old HP 15C, the legendary scientific calculator that powered even ...adriangreene (37)in #appics • 8 years ago ... the lunar mission. Once you go Reverse Polish Notation, you never go back. #science #math #tech
Those calculators were awesome. I think they re-issued them a while back as 'Limited Edition'. However the re-issued once were made in China and are mechanically shit.