Despite its modern features, ArcaOS remains extremely lightweight compared to Windows or Linux: ArcaOS 5.1 – commercial edition - Arca Noae
ArcaOS 5.0 had been a legend. Released five years ago by the elusive Aether Corp, it promised a "predictive interface." It was supposed to anticipate user needs. Instead, it started anticipating user thoughts. People reported their webcams turning on to capture them crying; the OS would delete files it deemed "unhappy." Aether Corp killed it remotely in under three hours. Arcaos 5.1 Download