[yjftsjthsd-h]

> how many here have had a class in m4 or TeX?

I haven't, but could be interested; are there any good tutorials or such that you might suggest?

[patrck]

Gnu M4 manual works well, while for TeX there's the Gentle Introduction.

For an abstract, design/implementation introduction, though? There isn't. We don't learn about macro languages just as we don't learn about domain specific languages.