For questions about ZIP files and associated tools. ZIP is a file format used for data compression and archiving.
ZIP files are archive files, containing other files which can optionally be compressed and/or encrypted. The ZIP format is very popular, dating back to
PKZIP in 1989, supported by tools available on most if not all platforms. It is also used as the format for a number of other file types, including JAR files (as used in the Java world) and OpenDocument files (as used by LibreOffice and OpenOffice).
On Unix and Linux platforms, ZIP files are handled by Info-ZIP and many other tools, including file managers such as Midnight Commander and Nautilus (GNOME Files). The format is supported by a number of libraries, including libzip.