Monday's Riddle: Wired To Do...

Hello, Riddlers! Can you guess our theme? Some look very real! ; ) ~ F
Controlled by forces outside of myself, when I'm off I sit on a shelf. Switch it up, and I'll do my task, calculating odds in a faux mask. My goal is to serve what I don't know. I can only relate to that which I sew. Instructions are given, then I proceed. I do not compute emotional need. 

What am I? Stop by Wednesday for the answer!
I gave you a clue!


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