Once we’ve talked about touch monitors... I work in a supermarket, fashed chicken and packed on a special machine. There is a touch screen. In a small room, I am alone. When I go for a break, I turn off the lights. And the flies fly to the only source of light – the touch screen. In general, somehow in 15 minutes of my absence the flies had time to change the number to an earlier one, changed the rate of feed of the plate, the tension of the film, the temperature of bumping and printed a sticker with the amount of chicken packed for today...