Files named with this specific pattern are frequently found on:
Where long strings act as unique keys for a specific upload. 83NT984PR95C95P9S94.part4.rar
Where the filename itself is part of a naming convention meant to be decrypted by a specific software downloader. Safety and Extraction Files named with this specific pattern are frequently
This is the file extension for the WinRAR archival format, which uses high-level compression to reduce file size. Context and Usage 83NT984PR95C95P9S94.part4.rar
Where binary data is split into small "articles" for newsgroup posting.