"OE" on PSP listings typically stands for Original Edition. It distinguishes the standard launch release from later re-releases, bundles, or budget lines.
"OE" is not a Sony-official term—it's community/retail shorthand. Always verify by checking the **spine code** (e.g., UCUS-98600) and **disc hub serial** against databases like PSP Paradise, **Redump.org**, or **PriceCharting**.