One of the dogs raised its head as if on signal, listened a minute with its ears up, and then put its head back down between its paws.

NEWYORKER: Beginners

Previously I wrote here on Forbes about a sell signal on Apple arising from the head and shoulders pattern.

FORBES: Apple Tests Support After Head-And-Shoulders Tumble

Head tilting is another signal that you are interested, curious and involved.

FORBES: Want to Build Collaboration? Watch Your Body Language!

One challenge would involve creating a magnetic head that could hover over those dots, read their signal and write new data onto the grid.

FORBES: Magazine Article

Jerry Levin was head of HBO and had the insight to beam up the signal via satellite so everyone could watch.

FORBES: Why Are HBO Television Series So Good?

Each segment has an electromagnet attached to it, and these are activated by a current that flows from head to tail in more or less the way that a nerve signal flows in a real animal.

ECONOMIST: Robots

David McCorquodale, head of retail for KPMG, said the figures sent "a worrying signal" about the festive season ahead for retailers in Scotland.

BBC: Shopper

It also takes note of whether the bus' turn signal is on and can prepare a green turn arrow if the bus needs to head left or right.

FORBES: Magazine Article

Amos Yadlin, a former head of Israel's military intelligence, said the strike is a signal to Syria's ally, Tehran, that Israel is serious about the red lines it has set.

NPR: Israeli Warplanes Strike Syria In Escalation

The head of the joint venture that oversees Farsi1 said it had experienced interference when its signal was located near BBC Persian or near other news channels, but this subsided after it moved to a different transponder.

WSJ: Censorship Inc.: In Skies Over Iran, a Battle for Control of Satellite TV