I wrote mine before word was really a thing. I used LaTex, and had to create my own style setup. It wasn't too difficult. I had programs generate EPS documen

I wrote mine before word was really a thing. I used LaTex, and had to create my own style setup. It wasn't too difficult. I had programs generate EPS documents for inclusion of figures, resize jpg/png images, run the multiple pass latex compilation. I am pleased to report that the makefile for my thesis still works, and generates close to the original doc, 20 something years later. I can barely open a 10+ year old office doc thanks to incompatibilities within the product. Back in those days, word processors would not do complicated multi-line equations very well; type setting for print, display, etc. This was a problem for me. To each their own though. I wound up writing some user manuals for products I developed in the late 90's in LaTeX as well. I've not used it much since.