Cuneiform to left-to-right in horizontal rows (rotating all of the pictographs 90° counter-clockwise in the process) and a new wedge-tipped stylus was introduced which was pushed into the clay, producing wedge-shaped ("cuneiform") signs; these two developments made writing quicker and easier. By adjusting the relative position of the tablet to the stylus, the writer could use a single tool to make a variety of impressions. Cuneiform tablets could be fired in kilns to bake them hard, and so provide a permanent record, or they could be left moist and recycled, if permanence was not needed. Many of the clay tablets found
Cuneiform the number of characters in use grew smaller (Hittite cuneiform). The system consists of a combination of logophonetic, consonantal alphabetic and syllabic signs. The original Sumerian script was adapted for the writing of the Semitic Akkadian (Assyrian/Babylonian), Eblaite and Amorite languages, the language isolates Elamite, Hattic, Hurrian and Urartian, as well as Indo-European languages Hittite and Luwian; it inspired the later Semitic Ugaritic alphabet as well as Old Persian cuneiform. Cuneiform writing was gradually replaced by the Phoenician alphabet during the Neo-Assyrian Empire (911–612 BC). By the second century AD, the script had become extinct, its last traces being found