Seeing this question asked makes me sad. If you are browsing this on Linux then you're probably using code descended from Netscape which was developed by a guy called Zawinski on an SGI Indy.

Or if you have seen a movie, then all the special effects are descended from work done on SGI machines.

If you have fuel in your car, the oil field was probably originally found after running seismic analysis on an SGI. They were famous for their movie work but Oil & Gas was actually a far bigger market for them.

If you have flown anywhere, the pilot was trained on a simulator descended from technology developed by SGI.

If you program C++ then STL comes from SGI. As does the XFS filesystem.

If you have seen a weather forecast on TV, that probably was done on a Cray, who for a while were owned by SGI and who developed a lot of their tech. Many TV stations used SGIs to render the forecast on the green screen behind the presenter too.

If you have played Nintendo, the MIPS processor in it was developed by SGI. If you play games on PC, OpenGL was developed by SGI.

They were once one of the most influential computing companies in the world. Now they are merely a legend, and a fading one at that :-(