A typeface designed in the 1960s for the IBM Selectric typewriter. Based on Dual Basic for the standard IBM typewriter.

Digital interpretations include LL Superstudio (Jonathan Hares, Lineto, 2003) based in the 12 pitch size), AMB Dual Mono (Mateo Broillet), and CMM Coda (Anna Cairns, Comma Type, 2024).