Continuing on with my series of typographic symbols… Ligatures.
Ligature in typographic terms, refers to the purposeful joining of two letters to create a single glyph. A ligature is something you see in your reading everyday, but probably never noticed. Common ligatures include ﬁ or ﬂ. Most everyday ligatures are used to solve a letterspacing issue, while other ligatures are used for languages to create specific sounds. Examples include: aesc, eszett, and ethel (Æ æ ß Œ œ)
“Typography makes at least two kinds of sense, if it makes any sense at all. It makes visual sense and historical sense.” –Robert Bringhurst