With Filestar you get 0 different skills for working productively with ICU Common Data Archive (.dat) files.
About .Dat
Name
ICU Common Data Archive
Extension
.dat
Format
Binary
Category
Other
Developer
Unicode, Inc.
Description
The Unicode ICU library's packed resource data (icudt*.dat), which programs that use ICU ship alongside themselves. It holds the library's own locale and timezone resources - not a customer document, image or sound, and nothing in it converts.