Letter
Letter is a symbol or character that is used in writing and printing to represent a speech sound in a language. Letters are the building blocks of words, which are used to communicate ideas and information. They are the fundamental components of alphabets, and each letter generally represents a phoneme in the spoken form of the language.
Letters can be classified into two types: vowels and consonants. Vowels are speech sounds that are produced without any significant obstruction in the vocal tract, while consonants are produced by obstructing the air flow in some way. The English alphabet, for example, has 26 letters, with 5 vowels (a, e, i, o, u) and 21 consonants.
Letters can also be categorized as either uppercase or lowercase, which are also known as capital and small letters, respectively. Uppercase letters are used at the beginning of sentences and for proper nouns, while lowercase letters are used in all other instances.
In addition to their use in writing and printing, letters also have a significant role in digital communication. They are used in emails, text messages, and social media posts, among other forms of digital communication.
Letters have a long history, with the first alphabets appearing in the 2nd millennium BC. The modern English alphabet is a Latin alphabet consisting of 26 letters, each having an uppercase and a lowercase form, and can be traced back to the 7th century.
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Contributors: Prab R. Tumpati, MD