S. E. J. Keyer has written:

'De macht van de onmacht' -- subject(s): Economic conditions, Social conditions

He invented Morse code and the device called a Keyer to send the code.

The are numerous occupational titles that only have five letters in them. Examples would be nurse, guard, clerk, keyer, agent, and diver.

There are several features that Icom transceivers have. Examples would include noise blanker, microphone compressor, lock, keypad input, VOX function, and CW keyer.

Green is better for digital keying and blue is better for film.

It is also handy to use blue if the subject is wearing a green shirt.