I (named i , plural ies) is the ninth letter and the third vowel in the ISO basic Latin alphabet.

I-bar (majuscule: , minuscule: ), also called barred-i, is a letter of the Latin alphabet, formed from I or i with the addition of a bar.

The suffix -i may be:

• An English suffix used to create demonyms (see Demonyms#Suffixation.)
• A suffix in Hebrew.
• An Arabic suffix used to form a nisba (see Arabic grammar#nisba.)

Ì is used in the ISO 9:1995 system of Ukrainian transliteration as the Cyrillic letter І.

(i-acute) is a letter in the Faroese, Hungarian, Icelandic, Czech, Slovak, and Tatar languages, where it often indicates a long /i/ vowel. This form also appears in Catalan, Irish, Occitan, Portuguese, Spanish, Galician, Leonese, Navajo, and Vietnamese language as a variant of the letter “i”. In Latin, the long i  is used instead of for a long i-vowel.

(i-circumflex) is a letter in the Friulian, Kurdish, and Romanian alphabets. This letter also appears in French, Turkish, Italian, Welsh and Walloon languages as a variant of letter “i”.

A breve (, less often ; ; from the Latin brevis “short, brief”) is the diacritic mark ˘, shaped like the bottom half of a circle. As used in Ancient Greek, it is also called vrachy or brachy. It resembles the caron (the wedge or háček in Czech) but is rounded; the caron has a sharp tip.

A caron or háček (; from Czech háček ) or mäkčeň (; from Slovak mäkčeň or ), also known as a wedge, inverted circumflex, inverted hat, is a diacritic ( ˇ ) placed over certain letters to indicate present or historical palatalization, iotation, or postalveolar pronunciation in the orthography of some Baltic, Slavic, Finnic, Samic, Berber and other languages. The caron also indicates the third tone (falling and then rising) in the Pinyin romanization of Mandarin Chinese.

The Turkish alphabet, which is a variant of the Latin alphabet, includes two distinct versions of the letter I, one dotted and the other dotless.

I is the ninth letter of the Latin alphabet.

I ♥… is a British television and compilation album brand by the BBC, which looks back at a specific year in each episode. The programs consist of celebrities and public figures discussing, reminiscing and commenting on the pop culture of the time i.e. films, fads, fashion, television, music etc. that relate to the program's overall topic.

i* (pronounced "i star") or i* framework is a modeling language suitable for an early phase of system modeling in order to understand the problem domain. i* modeling language allows to model both as-is and to-be situations. The name i* refers to the notion of distributed intentionality which underlines the framework. It is an approach originally developed for modelling and reasoning about organizational environments and their information systems composed of heterogeneous actors with different, often competing, goals that depend on each other to undertake their tasks and achieve these goals. It covers both actor-oriented and Goal modeling. i* models answer the question WHO and WHY, not what.

Increment and decrement operators are unary operators that add or subtract one from their operand, respectively. They are commonly implemented in imperative programming languages. C-like languages feature two versions (pre- and post-) of each operator with slightly different semantics.

An iodide ion is the ion I^-. Compounds with iodine in formal oxidation state -1 are called iodides. This page is for the iodide ion and its salts, not organoiodine compounds. In everyday life, iodide is most commonly encountered as a component of iodized salt, which many governments mandate. Worldwide, iodine deficiency affects two billion people and is the leading preventable cause of intellectual disability.

A macron is a diacritical mark, a straight bar placed above a letter, usually a vowel. Its name derives from the Greek  (makrón), meaning "long", and was originally used to mark long or heavy syllables in Greco-Roman metrics. It now more often marks a long vowel. In the International Phonetic Alphabet, the macron is used to indicate a mid-tone; the sign for a long vowel is instead a modified triangular colon .

The ogonek (Polish: , "little tail", the diminutive of ogon; ) is a diacritic hook placed under the lower right corner of a vowel in the Latin alphabet used in several European languages, and directly under a vowel in several Native American languages.

In computer science, a preprocessor is a program that processes its input data to produce output that is used as input to another program. The output is said to be a preprocessed form of the input data, which is often used by some subsequent programs like compilers. The amount and kind of processing done depends on the nature of the preprocessor; some preprocessors are only capable of performing relatively simple textual substitutions and macro expansions, while others have the power of full-fledged programming languages.

The tilde (; ˜ or ~) is a grapheme with several uses. The name of the character came into English from Spanish, which in turn came from the Latin , meaning "title" or "superscription".