2575 Data File Generic Dataset .dat files are used by many different applications as a general data store. Some may have a precise structure, but this entry is intended as a catch-all for extension-only identification for those .dat formats that do not yet have a PRONOM identification signature. For ESRI ArcInfo DAT File (Internal), see fmt/1600. 244 Preservica / Preservica 18 Jul 2022 18 Jul 2022 fmt/1730 PUID dat File extension