Worked for a small printing house for a while back when laser printers were new. We had two Apple LaserWriters that we would proof on before submitting to the big Linotronic machine. We would accept TeX, troff, PageMaker documents and print them — theses, specialist text books, self-published books. Every time we got a WordStar or MS Word document, it was given to me to convert into TeX; we had two old UNIX guys that would go through and check troff documents for correctness, so I picked up a bit of troff there. Good times.