Files with it3 extension can be found as log files from old Internet Timer program.
IT3 file extension - Internet Timer log
What is it3 file? How to open it3 files?
File type specification:
The it3 file extension was in the past used in Internet Timer program for its log files. Seems like the program is no longer available and this file type is probably obsolete.
This it3 file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.