A typically finite set of distinguishable symbols.
The set of letters used when writing in a language.
An agent of the FBI, the CIA, or another such government agency.
A writing system in which there are letters for the consonant and vowel phonemes. (Contrast e.g. abjad.)
A writing system in which letters represent phonemes. (Contrast e.g. logography, a writing system in which each character represents a word, and syllabary, in which each character represents a syllable.)
An individual letter of an alphabet; an alphabetic character.
The simplest rudiments; elements.
To designate by the letters of the alphabet; to arrange alphabetically.
A ciphertext, a cryptogram, an encrypted value. Usually used with the preposition "of" followed by the value that is hidden in it.
The process of obscuring information to make it unreadable without special knowledge, key files, or passwords.