![Part 3: Understanding Topic Discovery from an “historical” perspective](https://blogs.sas.com/content/sascom/files/2017/01/Analytics-2-702x336.png)
I mentioned last time that the technique we use to determine topics is a variant of something that has been around for fifty years. In this part I will talk about the intriguing history of this technique, and in the process, I hope to illuminate what we are doing and