The course list isn't chronological, it's sorted by certification number. From this you can infer that, say TX07031JF was certified after TX07030JF, but there's no relationship between that and TX07031ETM. My Access file has a "date entered" field, but that only gives the date I received it, and only for the courses received since 2006, a tiny fraction of the 29,000 total courses in the file.
As far as electronic files go, a PDF doen't make things any simpler for me. I'd have to convert it to our PNG 2550x3300 2-bit standard and print a paper copy for the files. It's actually more trouble than scanning a map, which I do in batches of 20-100 per night.