The story
Short for procedural signal.
Etymology from Wiktionary, CC BY-SA 4.0.
prosign
Today it means: Any of a set of special sequences in Morse code used as control characters and punctuation. Full definition →
Today it means: Any of a set of special sequences in Morse code used as control characters and punctuation. Full definition →
Short for procedural signal.
Etymology from Wiktionary, CC BY-SA 4.0.