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Image of Bacon's cipher. Bacon's cipher or the Baconian cipher is a method of steganographic message encoding devised by Francis Bacon in 1605. [1] [2] [3] In steganograhy, a message is concealed in the presentation of text, rather than its content.
The pigpen cipher uses graphical symbols assigned according to a key similar to the above diagram. [1]The pigpen cipher (alternatively referred to as the masonic cipher, Freemason's cipher, Rosicrucian cipher, Napoleon cipher, and tic-tac-toe cipher) [2] [3] is a geometric simple substitution cipher, which exchanges letters for symbols which are fragments of a grid.
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Radio communication was by wireless telegraphy; at the sending end, an operator tapped on a switch which caused the radio transmitter to produce a series of pulses of radio waves which spelled out text messages in Morse code. At the receiver these sounded like beeps, requiring an operator who knew Morse code to translate them back to text.
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Morse code signals spelling out radioactivity are also present, near the beginning of the track and again near the end. The second time the message continues with is in the air for you and me . The song was re-recorded as a radically different version for The Mix album in 1991 and was issued as a single in an edited form with remixes by ...
Repeaters are often designed to automatically transmit the repeater's callsign, usually in Morse code. The requirements for the United States are covered in Title 47 of the Code of Federal Regulations, part 97.119. Land mobile two-way (including public safety and business mobile) require station identifications by call sign.
CQ call of German amateur radio station DG2RBH on the 80 m band ("Hello CQ from Delta Golf 2 Romeo Bravo Hotel") CQ is a station code used by wireless operators derived from long established telegraphic practice on undersea cables and landlines, particularly used by those communicating in Morse code, ( ), but also by voice operators, to make a general call (called a CQ call).