operating prosign
1Morse code — Chart of the Morse code letters and numerals Morse code is a method of transmitting textual information as a series of on off tones, lights, or clicks that can …
2SOS — is the commonly used description for the international Morse code distress signal (· · · · · ·). This distress signal was first adopted by the German government in radio regulations effective April 1, 1905, and became the worldwide standard when… …
3Okay — For other uses, see Okay (disambiguation). O.K. redirects here. For other uses, see OK (disambiguation). Okay (also spelled OK, O.K. ) is a colloquial English word denoting approval, acceptance, agreement, assent, or acknowledgment. Okay has… …
