: Significantly higher compression for many small, similar files.
In many administrative and mailing systems, "a9zip" is shorthand for a full 9-digit ZIP code. Introduced by the USPS in 1983, the code consists of the standard five digits followed by a hyphen and four additional digits. : Significantly higher compression for many small, similar
If your interest is in file management, "solid" archiving is a technique where multiple files are treated as a single continuous data stream to improve compression ratios. : Significantly higher compression for many small, similar