My trusty 50G got me through High School and parts of College. Programming w/ RPL was something of an enlightening experience. RPN and RPL are what made the con

My trusty 50G got me through High School and parts of College. Programming w/ RPL was something of an enlightening experience. RPN and RPL are what made the concept of 'the stack' finally click for me. RPL was also fantastically simple, too. While other kids were struggling to copy the TI-basic instructions from photocopied sheets: I would quickly have a working program _plus a nifty little GUI._ The equation library and CAS were also incredibly useful when I was given the opportunity to use them. --- The only downside is I couldn't swap any games w/ my classmates. That's OK, though, as I had 3D pinball.