Analysis of information sources in references of the Wikipedia article "Escape sequence" in English language version.
When a modem is in command mode, the modem can accept commands from you
vi commands […] Pressing the Esc (Escape) key is how you […]
The Baudot code, invented in 1870 and patented in 1874 by J. Baudot is […]
Character combinations consisting of a backslash \ followed by a letter or by a combination of digits are called escape sequences.+++ - "Escape Sequence" - This command initiates an escape sequence to return the modem to the on-line command mode
elements C0 and C1 of control characters […] a 5-bit code patented by Jean-Maurice-Emile Baudot (1845-1903) in 1874
5.1.1.2 Translation phases, 2.: Each instance of a backslash character (\) immediately followed by a new-line character is deleted, splicing physical source lines to form logical source lines. [...]Within the field, two consecutive apostrophes […]