On 18 May 2007, Canadian programmer Bil Simser and his wife welcomed a daughter named Vista Avalon. She was named after the Windows Vista operating system.
How did they come up with the name? They were considering “Dev Orion Simser” for a boy, then thought:
Well, if our son’s initials are DOS, a daughter would have [to] be an upgrade. And thus the name Vista was born.
Source: Microsoft Click