1) Adjusting 2) Entering on a computer 3) Radio modulation mode 
[ship] Keying had been purchased in August 1846 in secrecy by British businessmen in Hong Kong, defying a Chinese law prohibiting the sale of Chinese ships to foreigners. She was renamed after the Manchu official Keying, based on an irregular romanization of his native name. The Keying was manned by 12 British and 30 Chinese sailors (the la...[telecommunications] Keying is a family of modulation forms where the modulating signal takes one of a specific (predetermined) number of values at all times. The goal of keying is to transmit a digital signal over an analogue channel. The name derives from the Morse code key used for telegraph signaling. Modulation is the general technique...
• (p. pr. & vb. n.) of Key
A mechanical method of preventing incorrect interconnection of mating components (such as connectors). 
An special effects process, specific to video, in which an image or text is inserted into another im
The use of symbols, usually letters, to code copy that will appear on a dummy.