Lowercase in the context of "Small caps"

Æ (lowercase: æ) is a character formed from the letters a and e, originally a ligature representing the Latin diphthong ae. It has been promoted to the status of a letter in some languages, including Danish, Norwegian, Icelandic, and Faroese. It was also used in both Old Swedish, before being replaced by ä, and Old English, where it was eventually dropped entirely in favour of a. The modern International Phonetic Alphabet uses it to represent the near-open front unrounded vowel (the sound represented by the 'a' in English words such as cat). Diacritic variants include Ǣ/ǣ, Ǽ/ǽ, Æ̀/æ̀, Æ̂/æ̂ and Æ̃/æ̃.

As a letter of the Old English Latin alphabet, it was called æsc, "ash tree", after the Anglo-Saxon futhorc rune ᚫ which it transliterated; its traditional name in English is still ash, or æsh (Old English: æsċ) if the ligature is included.

The long s, ⟨ſ⟩, also known as the medial s or initial s, is an archaic form of the lowercase letter ⟨s⟩, found mostly in works from the late 8th to early 19th centuries. It replaced one or both of the letter s in a double-s sequence (e.g., "ſinfulneſs" for "sinfulness" and "poſſeſs" or "poſseſs" for "possess", but never "poſſeſſ"). The modern ⟨s⟩ letterform is known as the "short", "terminal", or "round" s. In typography, the long s is known as a type of swash letter, commonly referred to as a "swash s". The long s is the basis of the first half of the grapheme of the German alphabet ligature letter ⟨ß⟩, (eszett or scharfes s, 'sharp s'). As with other letters, the long s may have a variant appearance depending on typeface: ſ, ſ, ſ, ſ.

The tittle or superscript dot is the dot on top of lowercase i and j. In English writing the tittle is a diacritic which only appears as part of these glyphs, but diacritic dots can appear over other letters in various languages. In most languages, the tittle of i or j is omitted when a diacritic is placed in the tittle's usual position (as í or ĵ), but not when the diacritic appears elsewhere (as į, ɉ).

The number density (symbol: n or ρ_N) is an intensive quantity used to describe the degree of concentration of countable objects (particles, molecules, phonons, cells, galaxies, etc.) in physical space: three-dimensional volumetric number density, two-dimensional areal number density, or one-dimensional linear number density. Population density is an example of areal number density. The term number concentration (symbol: lowercase n, or C, to avoid confusion with amount of substance indicated by uppercase N) is sometimes used in chemistry for the same quantity, particularly when comparing with other concentrations.

Insular script is a medieval script system originating in Ireland that spread to England and continental Europe under the influence of Irish Christianity. Irish missionaries took the script to continental Europe, where they founded monasteries, such as Bobbio. The scripts were also used in monasteries, like Fulda, which were influenced by English missionaries. They are associated with Insular art, of which most surviving examples are illuminated manuscripts. It greatly influenced modern Gaelic type and handwriting.

The term "Insular script" is used to refer to a diverse family of scripts used for different functions. At the top of the hierarchy was the Insular half-uncial (or "Insular majuscule"), used for important documents and sacred text. The full uncial, in a version called "English uncial", was used in some English centres. Then "in descending order of formality and increased speed of writing" came "set minuscule", "cursive minuscule" and "current minuscule". These were used for non-scriptural texts, letters, accounting records, notes, and all the other types of written documents.

Sigma (/ˈsɪɡmə/ SIG-mə; uppercase Σ, lowercase σ, lowercase in word-final position ς; Ancient Greek: σίγμα) is the eighteenth letter of the Greek alphabet. When used at the end of a letter-case word (one that does not use all caps), the final form (ς) is used. In Ὀδυσσεύς (Odysseus), for example, the two lowercase sigmas (σ) in the center of the name are distinct from the word-final sigma (ς) at the end.

In the system of Greek numerals, sigma has a value of 200. In general mathematics, uppercase Σ is used as an operator for summation. The Latin letter S derives from sigma while the Cyrillic letter Es derives from a lunate form of this letter.