Today is "Ghost in the Machine Day."  Thank you west coast brother. The name comes from a 1993 horror/sci-fi movie of that title.  While the idea of Cartesian Dualism (ghost being the mind, machine being the body - separate but complimentary necessities) is interesting, it's not what I think of when I think of ghosts in machines.  

To me the 'being' who frequently messes with the reception on our family room TV (while the other TVs work just fine) counts as a ghost.  The alarm clock that I used to keep in my bathroom was certainly haunted when it started sounding off at midnight, even though I had never set the alarm, and checked frequently to be sure it was turned off.  After a couple of nights of this I unplugged it and threw it in a drawer.  That fixed that ghost.  

And then there is our cuckoo clock.  It's a fine clock that sounds off on the hour and half hour, as long as it is wound regularly.  But what I find interesting is its variety of messages.  Sometimes it says 'cuckoo, cuckoo' but other time it sounds like 'uh oh, uh oh' and yet again there are times when it sounds like 'oh no, oh no.'  'You who, you who' is another frequent message.  These mixed messages are most noticeable at midnight and 6:00am.  If that's not a ghost in a machine, I don't know what is.  

I bet if you think about it, you can come up with at least three ghost haunted machines in your house.