ePSD is an online lexicon of Sumerian, the world's earliest written language which has no relatives, living or dead. The project is housed at the Penn Museum because of its outstanding collection of ancient scribal excercises in Sumerian.
ePSD has created an online lexicon of Sumerian as it occurs in cuneiform texts from ancient Iraq, dating from about 2700 to1600 BCE. The lexicon consists of basic definitions of words, and can be searched in English. Words are linked from the lexicon entries to all the places where they occur in a corpus of about 90,000 texts. ePSD is designed to grow to keep pace with new scholarship and new texts.