I've just read the chapters on VisiCalc and Lotus 1-2-3 in "Founders at Work". It looks like VisiCalc made the Apple II take off back in the early days. And Lotus 1-2-3 addressed all the pain points people had with it a few years later on a more powerful platform (PC). Interesting stuff for sure. Why do I discover this book 12 years after it was published?