In typography, text or font in all caps contains capital letters without any lowercase letters. For example:THIS TEXT IS IN ALL CAPS.
The name of the railway engine Mallard, set in all capital letters
Bilingual sign in Ireland. The eclipsis of P to bP uses lower case in an otherwise all-caps text.
Letter case is the distinction between the letters that are in larger uppercase or capitals and smaller lowercase in the written representation of certain languages. The writing systems that distinguish between the upper- and lowercase have two parallel sets of letters: each in the majuscule set has a counterpart in the minuscule set. Some counterpart letters have the same shape, and differ only in size, but for others the shapes are different. The two case variants are alternative representations of the same letter: they have the same name and pronunciation and are typically treated identically when sorting in alphabetical order.
Divided upper and lower type cases with cast metal sorts
Layout for type cases
Handwritten Cyrillic script
Papyrus fragment with old Roman cursive script from the reign of Claudius (41–54 CE)