Why Computer Voices Are Mostly Female

From voice-mail systems to GPS devices to Siri and beyond, why are so many computerized voices female? One answer may lie in biology. Scientific studies have shown that people generally find women's voices more pleasing than men's.
Another answer lies in history. According to some sources, the use of female voices in navigation devices dates back to World War II, when women's voices were employed in airplane cockpits because they stood out among the male pilots. And telephone operators have traditionally been female, making people accustomed to getting assistance from a disembodied woman's voice.The Presurfer