Knuth used WEB to program TeX and METAFONT, and published both programs as books: The TeXbook, which is originally published in 1984, and The METAFONTbook, which is originally published in 1986. Around the same time, LaTeX, the now-widely-adopted macro package based on TeX, was first developed by Leslie Lamport, who later published its first user manual in 1986.