Frank Filz has done an amazing thing for those of us who are very, very obsessed with digging into the rules of Classic Traveller: He has created a section-by-section comparison of the text found in the 1977 edition of Traveller Books 1-3, the 1981 edition of Traveller Books 1-3, and the Starter Traveller and The Traveller Book editions of the game.
Some of the changes are small. Some are significant. Some will matter to you, but not another person. And some will make you go, “Oh, hey, that’s really interesting. I never noticed that before, but I prefer [insert your preference here] this version of the rules over the one I was familiar with.”
It’s often the kind of minutia I’m fascinated by as I piece together how the game played back in the 1970s–and how it began to shift as the RPG game design and publishing models shifted in the 1980s.