This week, Klaatu reads a post from the [MixedSignals](http://mixedsignals.ml) blog. This one isn't about lore, but THAC0 isan important part of D&D history, and if you ever thought to try AD&Dfor its historical charm, then you need to understand it.It's easier than you think, so tune in. shasum -a256=8afad47042a9ef6705cabf1975397fae0025c1f9fa0357e9eb155ef341b3fa3f