I purchased my first PC in 1985, for a princely sum of SGD3,500 — never mind if it was all DOS and no Windows. And my favourite app then was Lotus 1-2-3.
As a Product Design engineer who also tasked with costing. I faced the “formidable” challenge of compiling the costs of BOMs (bill-of-materials) which had up to 100 different components. I would do the calculations 10 times on my trusty calculator – but I always ended up with 10 different answers!
With the 1-2-3, all that became as simple as A-B-C. The arithmetical turbulence became a breeze. And editing of the BOMs no longer triggered explosive attacks on my poor heart.
Alas, with the rapid onslaught of Windows, my favourite spreadsheet was quickly decimated by MS Excel, though IMHO, this latter copycat offering by Microsoft did not result excel in anything.