Standard tools like WinRAR or 7-Zip are required to handle multi-part archives.
The file is the first segment of a multi-part compressed archive. While "ITA2022" can refer to various specific contexts—such as technical documentation for the International Trade Administration FY22 or academic proceedings—the file structure itself follows standard archive conventions. Multi-Part Archive Structure
Files named with .part1.rar , .part2.rar , etc., indicate a single large file that has been split into smaller pieces for easier sharing or storage.
You only need to right-click on the .part1.rar file and select "Extract Here". The software will automatically find and join the subsequent parts to recreate the original file.
Large installers or mod packs frequently use multi-part RAR files to bypass file size limits on hosting platforms.