Reprinted from TidBITS by permission; reuse governed by Creative Commons license BY-NC-ND 3.0. TidBITS has offered years of thoughtful commentary on Apple and Internet topics. For free email subscriptions and access to the entire TidBITS archive, visit http://www.tidbits.com/ Looking Back across Thirty Years of PCalc Adam Engst From PCalc developer James Thomson on the calculator's 30th anniversary: I was looking for a small project to learn how to program my new Mac properly, and I remembered the graphics I'd done for the control panel, and thought that they would work well for a calculator as well. Take note of 'a small project just to do X', this will be referred to many times during this story. The built-in Mac OS calculator of the day was a very simple affair, and so I decided I would write a calculator that could do binary and hex, to help me with my programming. And so the idea for PCalc was born. Who would have expected that a calculator app would thrive for 30 years, evolving through multiple Mac chip architectures and Apple operating systems and gaining easter eggs, in-app games, and spin-offs along the way? [1]Read on for all that, PCalc's connection to Douglas Adams of [2]The Hitchhiker's Guide to the Galaxy, and more great stories. [3]Read original article References 1. https://pcalc.com/mac/thirty.html 2. https://en.wikipedia.org/w/index.php?title=The_Hitchhiker%27s_Guide_to_the_Galaxy 3. https://pcalc.com/mac/thirty.html .