I've scanned in a pocket QRG for a language called "HP Atlas." It appears to be a 1970s-era language for 21MX-class machines. I can't find much out there about it beyond some HP press materials: http://chiclassiccomp.org/docs/index.php?dir=%2Fcomputing/HP or the direct link: http://chiclassiccomp.org/docs/content/computing/HP/92100-93007_HP-AtlasQRG… Most errors in the scan are, unfortunately, in the original (double-strikes, comb holes punched over text, etc)