BeOS was a revolutionary operating systems for PCs. I was working in the graphics team of Be Inc and responsible for the graphics drivers of SiS chipsets. SiS is one of the most important chipset makers for PCs. The company world leader in its domain. On the PC chipset markets, its products have been among the first to include graphics, network and sound processing on the motherboard.
You can find below some screenshots of Quake2, running on BeOS, on a SiS-based PC, using my driver. Playing quake was my QA work ;)