Ah those were the days, my friend.

[Matt Agajanian]

I musta bought it at Computique about the time I got my 32E but, I've got the TK Enterprises branded 'Everything You've Always Wanted to Know About RPN (But Were Afraid to Ask).' How it ended up that I bought it from Computique is a mystery to me. Although typos abound (even on the cover), it's still one of my most cherished and oft used resources.