Comment Legacy by definition (Score 2) 247
Back in the early 1990s we wrote some software in Borland C++ to run under Windows 95 on an industrial PC to do some measurements and transfer data via an RS232 link and installed these boxes at various transformer stations at a utility. We've managed to "update" the setup to run under Windows XP but the utility didn't want too many changes for new installations so it was still compiled under a late 1990s version of the Borland C++. It is fortunate that we also bought the source code for the Borland RS232 driver as that company went out of business long ago. National Instruments provides "legacy" drivers for their A/D cards so we can still purchase those, too. Now that all of us have retired or left the company I guess the whole system is now legacy though these installation are still operating as far as I know.
Though I remember the parts of the software I wrote fairly well it takes quite an effort to build, install and test its operation using the legacy compiler and drivers.