Quattro Pro for DOS revisited: an obsolete format no more?

Image sourced from Internet Archive , license unknown. in 2014 I wrote a post on the Quattro Pro for DOS spreadsheet formats. This documents my attempts at reading a few old Quattro Pro for DOS spreadsheets from my personal archives with modern (at the time) software. Back then, neither Microsoft Excel nor LibreOffice Calc supported these formats. Only the then-current Quattro Pro X7 was able to…