<p>TeX user since 1989, mostly LaTeX. For some time maintainer of pdfTeX, then a close friend of the LuaTeX team.</p>
<p><a href="http://meta.tex.stackexchange.com/questions/430/text-building-blocks">http://meta.tex.stackexchange.com/questions/430/text-building-blocks</a></p>

Martin Schröder