I just got my April issue of The American Surveyor magazine "A foot in the past... An eye to the future" and there is a great article in it about the DC50 along with some great pictures and pictures of the line of HP Calculators that were used in surveying leading up to the HP 50G. This can be found at www.TheAmericanSurveyor.com and under the "articles" link. Look near the bottom of the list in a Product Review by Al Pepling,LS.
Tim Wessman is named in athe article. "...and the software benefitted tremendously from Tim's programming skill."
Way to go Tim. The article is good, the pictures are good and I'll bet the product is good.
I just wish I had received my magazine earlier in April.
I hope I did the link correctly. If not maybe Tim can fix it for me.
Forrest