I have the HP-35s. I really like it, but the batteries die in around 2 years even if you don't use it. Other than that, it's a really fun, tactile calculator th

I have the HP-35s. I really like it, but the batteries die in around 2 years even if you don't use it. Other than that, it's a really fun, tactile calculator that I find myself pulling out for simple calculations. Here's a bug list tracker: https://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/articles.cgi?read=735 https://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/articles.c...