When a clock gene is switched on, it directs the cell to produce proteins, which eventually trigger a signal that switches the gene off.

BBC: Body clock 'set before birth'

The latch works by running an electrical current down a signal wire, through two switches.

ECONOMIST: A molecular replacement for the transistor?

The device "learns" the infrared signal from the TV remote and switches off the entire bank of plugs when the standby button on the remote is pressed.

WSJ: Switching Off Standby Mode

Unlike electronic switches, micro-mirror optical switches do not slow the signal down.

ECONOMIST: Reinventing Marconi

These switches are set off by a chemical signal sprayed on genetically tinkered seed.

ECONOMIST: Terminator genes

If you happen to come back into a 4G area (signal level above the 3G value), it switches modes again taking another 30 seconds to establish an active link.

FORBES: The Limits of 4G Connectivity

When the 4G signal is low and a 3G is available, the device switches modes.

FORBES: The Limits of 4G Connectivity

Converting them into photons requires costly computers, or switches, that modulate lasers so that light can carry the signal.

FORBES: Hooked on photonics

And they may also allow the development of purely optical switches, which would eliminate the need to convert a light signal into an electronic one before such switching can be accomplished.

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The idea here is that IDT's switches will offload tasks that take up a lot of bandwidth from the digital signal processors, thus improving bandwidth performance by up to 20%.

FORBES: The Chips Are Down--Time To Buy

It's also providing copper cable networks for the "last mile" of installed wire from central switches to homes and businesses, and products that help increase bandwidth, maintain signal integrity and optimize wavelength.

FORBES: Minnesota Mining & Catchall