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Hiero















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International Alphabet Flags





























Text Code












































Pirate Code

































Semaphore









































American Sign Language 
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Reverse Alphabet Code

Write the alphabet, then write the alphabet backwards underneath.

z y x w v u t  s r q p o n m  l k  j I h g f e d c b a

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


Vowel-less Code
Write the message, then remove all the vowels and run the letters together. 
Sound out the syllables until they make sense.

Example: “MTTTHLBRRT1900HRS”






















 

 




















































































Alpha-Numeric Code 

Write the letters of the alphabet. Underneath each letter, write a number, in sequence.

1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26 

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




Braille




Reverse Alphabet Code

Write the alphabet, then write the alphabet backwards underneath.

z y x w v u t  s r q p o n m  l k  j I h g f e d c b a

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


Vowel-less Code
Write the message, then remove all the vowels and run the letters together. 
Sound out the syllables until they make sense.

Example: “MTTTHLBRRT1900HRS”

 

 

Military Time Codes 

How to crack the code: TK

Military Time:   0100   0200    0300   0400   0500   0600

 Civilian Time:   1 am   2 am    3 am    4 am   5 am   6 am



LEET Code 



Phonetic Alphabet Code 



Telephone Code



Did you know….
Codes have been around for centuries! George Washington used a special code 
to communicate during the American Revolution.
Here’s an example of Washington’s code:



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