It used Unicode for filenames from the start, ensuring compatibility across different language systems—a feature not standard in many older archivers.
While 7-Zip has evolved, the core features that defined the 7z format during its early 2000s rise include: 2002 7z
The debut of the Lempel-Ziv-Markov chain algorithm (LZMA), which provided a high compression ratio even on the hardware of the time. It used Unicode for filenames from the start,
Unlike proprietary formats, 7z was built to be modular, allowing it to support any new compression or encryption method as they were developed. 7z was built to be modular
This feature allowed multiple files of a similar type to be treated as a single data stream, drastically improving efficiency for groups of small files.