: Often used in file naming to denote a specific version, such as a "beta" release, a "backup," or a specific "build" of a project.

: A proprietary archive file format (Roshal Archive) used for data compression. You need software like WinRAR or 7-Zip to extract its contents. Safety and Security Considerations

: Compressed archives are frequently used to mask viruses or Trojans. A file with a specific bracketed tag like "[b]" can sometimes be a spoofed name used on file-sharing sites to lure downloads.