I wrote a piece of code that was front-ended by Excel 3, in 1991 that talked to multiple, heterogeneous databases. There was some UUCP action, some FTP, DB2 on

I wrote a piece of code that was front-ended by Excel 3, in 1991 that talked to multiple, heterogeneous databases. There was some UUCP action, some FTP, DB2 on AS/400, some AT&T Unix, Wang, OS/2, and so on. It showed inventory and sales charts on a projector for executives. That thing ran till 2019 because the company called me and wanted to know how it worked. They were planning to replace it but could not figure it out. Excel never dies. (My first spreadsheet was SuperCalc. It was amazing, for that time, but no one seems to be talking about their SuperCalc sheets any more.)