HIStory of the RED LINE
(Symbolism required)
The Red line, or "to cross the red line", is a phrase used worldwide to mean a figurative point of no return or line in the sand, or "a limit past which safety can no longer be guaranteed".
The original purpose of the red vertical line notebook paper was to allow a wide left margin for the teacher to return homework with notes and comments written in that area.
The Red Line was the last of the four original Boston subway lines (Cambridge Tunnel, dividing the city).
On a CPU, red is used by Task Manager to show the amount of CPU that is spent executing kernel code, or the decreasing amount of usable space/memory remaining.
Hot Wheels cars produced from 1968 to 1977 (termed 'redline' series) were manufactured with a red stripe on the tire.
In literature, ideas exploring fascist thinking and an obsession with power as elements of the military mind documenting the human cost of war, a trilogy -From Here to Eternity [1951], The Thin Red Line [1962], and Whistle [1978] centered on loners who resisted adapting to military discipline.
The Red Star Line was an ocean passenger line founded in 1871 as a joint venture between the International Navigation Company of Philadelphia, which also ran the American Line, and the Société Anonyme de Navigation Belgo-Américaine of Antwerp, Belgium The Red Star Lines appear in The Godfather Part II (see Arnold Bernstein. sic) This line was in direct competition with Cunard's White Star Line. (think banks)
Moscow/Washington communications used what was called the "red telephone". The hotline was never a telephone line, and no red phones were used.
Gmail's new upgrade now features a red loading bar and a red line between its corporate logo and above mails and includes red text and icons for functional tabs.
The RED LINE is what separates our FREEDOM from CUMMUNISM
As evidenced above, we've been flirting with the proverbial red line for a very long time.