Cuneiform times of Parthian Empire (250 BC – AD 226). The last known cuneiform inscription, an astronomical text, was written in 75 AD. The complexity of the system prompted the development of a number of simplified versions of the script. Old Persian was written in a subset of simplified cuneiform characters known today as Old Persian cuneiform. It formed a semi-alphabetic syllabary, using far fewer wedge strokes than Assyrian used, together with a handful of logograms for frequently occurring words like "god" and "king". Ugaritic was written using the Ugaritic alphabet, a standard Semitic style alphabet (an "abjad") written using the
Elamite cuneiform and Indo-European languages. Scholars fiercely argue over several hypotheses about its origin, but have no definite theory. Elamite cuneiform comes in two variants, the first, derived from Akkadian, was used during the 3rd to 2nd millennia BCE, and a simplified form used during the 1st millennium BCE. The main difference between the two variants is the reduction of glyphs used in the simplified version. At any one time, there would only be around 130 cuneiform signs in use. Throughout the script’s history, only 206 different signs were used in total. The earliest known Elamite cuneiform text is a treaty between