28 different chronological periods, also depending on geographical contexts, are considered in [[http://cdli.ucla.edu|CDLI]] for dating cuneiform documents. These are:

^  Period  ^  Chronological Range  ^  CDLI texts and documents  ^
| Pre-Writing | ca. 8500-3500 BC |[[http://cdli.ucla.edu/search/search_results.php?SearchMode=Text&requestFrom=Search&Period=Pre-Writing|CDLI entries dated to that period]] |
| Uruk V | ca. 3500-3350 BC |[[http://cdli.ucla.edu/search/search_results.php?SearchMode=Text&requestFrom=Search&Period=Uruk+V|CDLI entries dated to that period]] |
| Uruk IV | ca. 3350-3200 BC |[[http://cdli.ucla.edu/search/search_results.php?SearchMode=Text&requestFrom=Search&Period=Uruk+IV|CDLI entries dated to that period]] |
| Uruk III | ca. 3200-3000 BC |[[http://cdli.ucla.edu/search/search_results.php?SearchMode=Text&requestFrom=Search&Period=Uruk+III|CDLI entries dated to that period]] |
| Proto-Elamite | ca. 3100-2900 BC |[[http://cdli.ucla.edu/search/search_results.php?SearchMode=Text&requestFrom=Search&Period=Proto-Elamite|CDLI entries dated to that period]] |
| Early Dynastic I-II | ca. 2900-2700 BC |[[http://cdli.ucla.edu/search/search_results.php?SearchMode=Text&requestFrom=Search&Period=ED+I-II|CDLI entries dated to that period]] |
| Early Dynastic IIIa | ca. 2700-2500 BC |[[http://cdli.ucla.edu/search/search_results.php?SearchMode=Text&requestFrom=Search&Period=ED+IIIa|CDLI entries dated to that period]] |
| Early Dynastic IIIb | ca. 2500-2340 BC |[[http://cdli.ucla.edu/search/search_results.php?SearchMode=Text&requestFrom=Search&Period=ED+IIIb|CDLI entries dated to that period]] |
| Ebla | ca. 2350-2250 BC |[[http://cdli.ucla.edu/search/search_results.php?SearchMode=Text&requestFrom=Search&Period=Ebla|CDLI entries dated to that period]] |
| Old Akkadian | ca. 2340-2200 BC |[[http://cdli.ucla.edu/search/search_results.php?SearchMode=Text&requestFrom=Search&Period=Old+Akkadian|CDLI entries dated to that period]] |
| Linear Elamite | ca. 2200 BC |[[http://cdli.ucla.edu/search/search_results.php?SearchMode=Text&requestFrom=Search&Period=Linear+Elamite|CDLI entries dated to that period]] |
| Lagash II | ca. 2200-2100 BC |[[http://cdli.ucla.edu/search/search_results.php?SearchMode=Text&requestFrom=Search&Period=Lagash+II|CDLI entries dated to that period]] |
| Harappan | ca. 2200-1900 BC |[[http://cdli.ucla.edu/search/search_results.php?SearchMode=Text&requestFrom=Search&Period=Harappan|CDLI entries dated to that period]] |
| Ur III | ca. 2100-2000 BC | [[http://cdli.ucla.edu/search/search_results.php?SearchMode=Text&requestFrom=Search&Period=Ur+III|CDLI entries dated to that period]] |
| Early Old Babylonian | ca. 2000-1900 BC |[[http://cdli.ucla.edu/search/search_results.php?SearchMode=Text&requestFrom=Search&Period=Early+Old+Babylonian|CDLI entries dated to that period]] |
| Old Assyrian | ca. 1970-1700 BC |[[http://cdli.ucla.edu/search/search_results.php?SearchMode=Text&requestFrom=Search&Period=Old+Assyrian|CDLI entries dated to that period]] |
| Old Babylonian | ca. 1900-1600 BC |[[http://cdli.ucla.edu/search/search_results.php?SearchMode=Text&requestFrom=Search&Period=Old+Babylonian|CDLI entries dated to that period]] |
| Middle Hittite | ca. 1500-1100 BC |[[http://cdli.ucla.edu/search/search_results.php?SearchMode=Text&requestFrom=Search&Period=Middle+Hittite|CDLI entries dated to that period]] |
| Middle Babylonian | ca. 1400-1100 BC |[[http://cdli.ucla.edu/search/search_results.php?SearchMode=Text&requestFrom=Search&Period=Middle+Babylonian|CDLI entries dated to that period]] |
| Middle Assyrian | ca. 1400-1000 BC |[[http://cdli.ucla.edu/search/search_results.php?SearchMode=Text&requestFrom=Search&Period=Middle+Assyrian|CDLI entries dated to that period]] |
| Middle Elamite | ca. 1300-1100 BC |[[http://cdli.ucla.edu/search/search_results.php?SearchMode=Text&requestFrom=Search&Period=Middle+Elamite|CDLI entries dated to that period]] |
| Neo-Assyrian | 911-612 BC |[[http://cdli.ucla.edu/search/search_results.php?SearchMode=Text&requestFrom=Search&Period=Neo-Assyrian|CDLI entries dated to that period]] |
| Neo-Elamite | 770-539 BC |[[http://cdli.ucla.edu/search/search_results.php?SearchMode=Text&requestFrom=Search&Period=Neo-Elamite|CDLI entries dated to that period]] |
| Neo-Babylonian | 626-539 BC |[[http://cdli.ucla.edu/search/search_results.php?SearchMode=Text&requestFrom=Search&Period=Neo-Babylonian|CDLI entries dated to that period]] |
| Achaemenid | 547-331 BC |[[http://cdli.ucla.edu/search/search_results.php?SearchMode=Text&requestFrom=Search&Period=Achaemenid|CDLI entries dated to that period]] |
| Hellenistic | 323-63 BC |[[http://cdli.ucla.edu/search/search_results.php?SearchMode=Text&requestFrom=Search&Period=Hellenistic|CDLI entries dated to that period]] |
| Parthian | 247 BC - 224 AD |[[http://cdli.ucla.edu/search/search_results.php?SearchMode=Text&requestFrom=Search&Period=Parthian|CDLI entries dated to that period]] |
| Sassanian | 224-641 AD |[[http://cdli.ucla.edu/search/search_results.php?SearchMode=Text&requestFrom=Search&Period=Sassanian|CDLI entries dated to that period]] |