My desktop OS: Zeta (NewsForge)
Zeta is based on the Be Operating System (BeOS). I have used BeOS since the free BeOS 5 Personal Edition was released in 2000, and its ease of use, quick boots, and minimal hardware requirements allowed BeOS to take full advantage of my computer, which had a 300MHz Celeron CPU, 64MB RAM, and 3dFX Voodoo 3 video adapter. Unfortunately, BeOS developer Be Inc. disbanded by the end of 2001, leaving an operating system that was unable to have more than 1GB of RAM, couldn't support up-to-date AMD and Intel CPUs without special boot disks, and lacked support for hard drives with more than 80GB of space and newer video cards."