Windows 98 Ping!.......................
Still got 98 running on one box.
It doesn’t do much anymore. Got a video card in there that can’t be migrated to anything newer.
> ...the MARSIS software was originally designed over 20 years ago, using a development environment based on Microsoft Windows 98!...
Win98 was a prevalent DEVELOPMENT environment at the time. In other words, the software TOOLS and UTILITIES ran on Earth in Windows 98 computers, and helped the programmers develop the spacecraft's software code.
However, the software code in the spacecraft itself has no Windows stuff in it, I guarantee that. :-)