I just took a quick look downstairs in my archives...I'd have to search electronic records to be sure, but it looks like somewhere in the mid-1980s..."The Electronic Scratchpad"..."We encourage you to ...[call]...our technical support line." ...the manual was produced in part with Ventura Publisher...remember that? I used that, too. OS required: MS-DOS or PC-DOS 2.x or 3.x 😉 Mathcad and AutoSketch (by Autodesk) were two products that I adopted in V1 because I thought that they showed so much potential, and I still use them both. I have a cute story regarding getting my first copy of AutoSketch, but not one for Mathcad. I was always on the lookout for engineering tools that I thought would give us an edge in our work, from software to HP calculators. My (engineering) supervisor gave me a lot of freedom to "explore new worlds" because the payoff in productivity for the engineering group was worth the investment. Mathcad was one of those tools that I thought was HOT! Even now, recalling those halcyon days of engineering innovation here in the US that seemed to characterize the times, I get a bit of a thrill when I recall using Mathcad to //vectorize// and display equations with the root symbol and integral symbol - unheard of at the time in desktop tools...pardon me while, like that walrus in another tale, I shed a tear for days gone by...;-)
~R~