Icelandic orthography

Compared with the 26 letters of English, the Icelandic alphabet lacks C, Q, W and Z, but additionally has Ð, Þ, Æ and Ö.

It originally represented an affricate [t͡s], which arose from the combinations ⟨t⟩+⟨s⟩, ⟨d⟩+⟨s⟩, ⟨ð⟩+⟨s⟩; however, in modern Icelandic it came to be pronounced [s], and since it was a letter that was not commonly used, it was decided in 1973 to replace all instances of ⟨z⟩ with ⟨s⟩.

[2] However, one of the most important newspapers in Iceland, Morgunblaðið, still uses it sometimes (although very rarely), a hot-dog chain, Bæjarins Beztu Pylsur, and a secondary school, Verzlunarskóli Íslands have it in their names.

⟨c⟩ is used on road signs (to indicate city centre) according to European regulation, and cm is used for the centimetre according to the international SI system (while it may be written out as sentimetri).

The alphabet as taught in schools up to about 1980[citation needed] has these 36 letters (and computers still order this way): a, á, b, c, d, ð, e, é, f, g, h, i, í, j, k, l, m, n, o, ó, p, q, r, s, t, u, ú, v, w, x, y, ý, z, þ, æ, ö.

The modern Icelandic alphabet developed from a standard established in the 19th century (primarily by Danish linguist Rasmus Rask).

It is ultimately based heavily on an orthographic standard created in the early 12th century by a document referred to as The First Grammatical Treatise, author unknown.