Few in the professional circles truly realize how much of their life situation,career and bank balance they owe to Dan Bricklin.
Dan Who ?
Exactly.
Dan invented something that may well last into the next century.
The true precursor to MS Excel.
Steve Jobs used to in that eloquent way he was known for said ‘Computers Are Like a Bicycle for the Mind‘
The Excel Program may just be one of the two wheels in that bike! The browser likely is the other wheel.
Thanks Dan!
Third Eye Observations 
So true. His gift was truly a game changer fir modern management.
If MS Excel did not become ‘a thing’ when I started working, so much of the career opportunities for MILLIONS would have been a life of manual ledgers!