I saw this accessory on the Mac and thought it was needed on the ST. If you need to look up information from the periodic Table often, then you will find this very helpful. It is in two versions, a program and an accessory, but both need the resource file. If you would like to see the source code, or need to be sure how to write an accessory in Modula-2, or feel very generous, you can send $5 to me to encourage my efforts. Thank you. Sol Guber 717 Elkington St. Louis, MO 63132