Indeed, America and Britain were so deeply penetrated that the Russians soon found out about Venona, changing their codes and cipher machines on October 29th 1948—"Black Friday" for code-breakers.

毫无疑问的，美国和英国非常清楚苏联很快就发现了Venona的存在，并更改了了他们的密码和密码机在1948年10月29号—译码者的“黑色星期五”。

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U.S. retailers can be happy about their performance on black Friday, the so-called official start of the holiday retail season.

FORBES: Magazine Article

About one-third of Black Friday shoppers were internet buyers, according to the NRF.

FORBES: Magazine Article

And yet we find ourselves entering another holiday season of familiar Black Friday headlines about shoppers being trampled in a mad effort to get their mitts on the latest offline deal.

FORBES: Offline Shopping is Alive and Trampling