I was on a trial with a nice ASUS computer when I needed to change my name, and the name ASUS is "Pegasus" shortened (sounds ridiculous but it's true), so I for some reason chose that. It was an impulse decision based on what I was reading at the time. I'm pleased with the decision though.
"Pegasus, the winged horse in Greek mythology represents inspiration and knowledge. These facets are not lost in ASUS, which is named after it. The company embodies the strength, purity, and creative spirit of this mythical creature, and soars to new heights with each product it produces."