The genetic code, in DNA letters (T instead of U), and containing amino acids in three representations: full name, 3-letter abbreviation, and 1-letter. Black and white version. Drawn in Inkscape.

How to read the genetic code: start from the center circle and go outwards. So, if the gene has an AGC, that means amino acid serine. A CGA means arginine. And three of the combinations are stop codons, which don't give any amino acid: TAA, TAG, and TGA.