What Does Mo Mean In Wall-E?

What Does Mo Mean In Wall-E? What does Mo mean in Wall-E? M-O. M-O (Microbe-Obliterator) is a cleaner-bot programmed to clean anything that comes aboard the Axiom that is deemed a “foreign contaminant.” M-O travels speedily around the Axiom on his roller ball, cleaning the dirty objects he encounters. Why does Mo chase in WALL-E?