Tengwar

The Tengwar are the older of the two Eldarin writing systems and the one meant to be written: the appendix says outright that they were devised for brush or pen, and that the squared shapes of inscriptions came afterwards, derived from the written forms. The Noldor developed them, and the letters that reached Middle-earth are Fëanor's — a largely new invention that still owed something to the older letters of Rúmil, which were never used there at all. The exiles brought them out of Aman, so that Edain and Númenóreans learned them; by the Third Age their use covered roughly the same ground as the Common Speech. What they are not is a fixed alphabet: the same sign does not always carry the same sound, because the values follow the mode a scribe writes in.