WAF- (abbr) Wife Acceptance Factor
The Wife Acceptance Factor is the number between 1 and 10 applied to electronic devices that get brought home. This number relates to how understanding a spouse is about it's usage and, indeed, it's very presence.
Eg: "The W.A.F. on my new digital camera is at an 8.6"
Eg: "With my lighting controls not working, the W.A.F. on my my home automation system is at an all time low"