International Morse Code
The Morse system of telegraphy was invented by Samuel F. B. Morse in the 1840s in the United States. Morse Code is a way to represent the letters of the alphabet using long and short pulses. A unique pattern of symbols is assigned to each character of the alphabet. These pulses are translated into electrical signals by an operator using a telegraph key, and the electrical signals are translated back into the alphabetic characters by a skilled operator at the receiving instrument.
A   .-
B   -...
C   -.-.
D   -..
E   .
F   ..-.
G   --.
H   ....
I   ..
J   .---
K   -.-
L   .-..
M   --
N   -.
O   ---
P   .--.
Q   --.-
R   .-.
S   ...
T   -
U   ..-
V   ...-
W   .--
X   -..-
Y   -.--
Z   --..
1   .----
2   ..---
3   ...--
4   ....-
5   .....
6   -....
7   --...
8   ---..
9   ----.
0   -----

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VOR for aircraft navigation
VOR for aircraft navigation
uses Morse Code identifier
,   --..--   comma
.   .-.-.-   period
?   ..--..   question mark
;   -.-.-   semicolon
:   ---...   colon
/   -..-.   slash
-   -....-   dash
'   .----.   apostrophe
()   -.--.-   parenthesis
_   ..--.-   underline

  .--.-   A with accent
  .-.-   A with two dots
  ..-..   E with accent
  --.--   N with tilde
  ---.   O with two dots
  ..--   U with two dots



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In 1844, Samuel F.B. Morse sent the first telegraph message from Baltimore to Washington, reading, "What hath God wrought." Telegraph lines were quickly strung across the country and by 1861 they had reached California, ending the need for the Pony Express after only ninteen months of operation. On December 17, 1903, when their powered plane left the earth for the first time, the Wright Brothers announced their discovery to the world in a telegraph message to their father from the Kitty Hawk Weather Station.

Though the telegraph has been replaced as a common means of communication, Morse Code is still used today by ham radio operators for worldwide communication, as well as by pilots to identify navigation signals.

"You see, wire telegraph is a kind of a very, very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? And radio operates exactly the same way: you send signals here, they receive them there. The only difference is that there is no cat."
-- Albert Einstein --
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