> I took the JPLDIS concept, cut back on the specs, and wrote Vulcan. JPLDIS would handle two hundred fields, but I thought sixteen was plenty. I got it working

> I took the JPLDIS concept, cut back on the specs, and wrote Vulcan. JPLDIS would handle two hundred fields, but I thought sixteen was plenty. I got it working and a little over a year after I started, I did my taxes on it. So, I figured Vulcan had some commercial potential, and I began to polish it up and get it to a sellable stage. In October 1979, I went to market and put my first ad for Vulcan in BYTE magazine, and I ran a quarter-page ad for four or five months thereafter. I got much more response than I could handle. Here's the ad: https://archive.org/details/byte-magazine-1979-10-rescan/page/n165/mode/1up https://archive.org/details/byte-magazine-1979-10-rescan/pag... Only $490, or the equivalent of $1860 today. Lots of other great old ads and articles in these BYTE Magazines! archive.org has a bunch of them.