Clever software monitors the grid and responds in a matter of milliseconds if it detects fluctuations.

ECONOMIST: ENERGY: Building the energy internet | The

U-Haul and Wells Fargo lost lawsuits against WhenU, whose software monitors surfing and inserts relevant ads behind the browser window.

FORBES: Parasite.com

The software also monitors school laptops if they are taken home: once plugged back into the school system the software highlights all of the activity carried out while the laptop was out of the school.

BBC: NEWS | UK | Education | Schools watch for paedophiles