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Chart of the Morse code 26 letters and 10 numerals [1]. This Morse key was originally used by Gotthard railway, later by a shortwave radio amateur [2]. Morse code is a telecommunications method which encodes text characters as standardized sequences of two different signal durations, called dots and dashes, or dits and dahs.
376 – Andorra (formerly 33 628) 377 – Monaco (formerly 33 93) 378 – San Marino (interchangeably with 39 0549; earlier was allocated 295 but never used) 379 – Vatican City (assigned but uses 39 06698). 38 – formerly assigned to Yugoslavia until its break-up in 1991. 380 – Ukraine. 381 – Serbia.
In cryptography, a Caesar cipher, also known as Caesar's cipher, the shift cipher, Caesar's code, or Caesar shift, is one of the simplest and most widely known encryption techniques. It is a type of substitution cipher in which each letter in the plaintext is replaced by a letter some fixed number of positions down the alphabet .
Dyadic number: 3: Triadic number: 4: Tetradic number: the same as dyadic number 5: Pentadic number: 6: Hexadic number: not a field: 7: Heptadic number: 8: Octadic number: the same as dyadic number 9: Enneadic number: the same as triadic number 10: Decadic number: not a field 11: Hendecadic number: 12: Dodecadic number: not a field
A language code is a code that assigns letters or numbers as identifiers or classifiers for languages. These codes may be used to organize library collections or presentations of data , to choose the correct localizations and translations in computing , and as a shorthand designation for longer forms of language names.
A telegraph code is one of the character encodings used to transmit information by telegraphy. Morse code is the best-known such code. Telegraphy usually refers to the electrical telegraph, but telegraph systems using the optical telegraph were in use before that. A code consists of a number of code points, each corresponding to a letter of the ...
A popular myth claims that the symbols were designed to indicate their numeric value through the number of angles they contained, but there is no contemporary evidence of this, and the myth is difficult to reconcile with any digits past 4. [12] Etching from 1503 (or earlier) showing usage of Arabic numerals.
In mathematics and computing, the hexadecimal (also base-16 or simply hex) numeral system is a positional numeral system that represents numbers using a radix (base) of sixteen. Unlike the decimal system representing numbers using ten symbols, hexadecimal uses sixteen distinct symbols, most often the symbols "0"–"9" to represent values 0 to 9 ...