Binary digits radioed at star cluster 25,000 light years away; contained semiprime #, atomic #s of hydrogen, carbon, nitron, oxygen, & phosphorus (DNA's elements), other DNA-related data, graphics of human, solar system, Arecibo telescope...
Taxonomy of Markup · I use a taxonomy of markup which I'm pretty sure was first advanced in the seminal November 1987 CACM article Markup systems and the future of scholarly text processing, by Coombs, Renear, and DeRose, which was the first place I ever