Hello, Sorry for a questioin that is a bit off-topic. I'm a bit confused about the TeX terminology. I know what is what, but I don't know how all these programs/packages/macros are officially called in English. How would you explain those in an encyclopedy with no more than one sentence? * plain TeX, LaTeX, ConTeXt are ... ? TeX formats ? (but ConTeXt is not just that) * TeX, eTeX, pdf(e)TeX, Aleph, Omega, XeTeX are ... ? TeX engines/extensions, an extended version of TeX ? * pdflatex is ... ? * texexec is ... ? * texutil, texfont are ... ? scripts/utilities for [whateverthetask] * MikTeX, TeX Live, teTeX are ... TeX distributions * PPCHTeX, XymTeX, MusicTeX are ... ConTeXt module(s) / LaTeX package(s) * PicTeX is ? TeX drawing environment * BibTeX is ... ? * TeXCeH is ... TeX user group Thanks a lot, Mojca