The native part of 7-Zip-JBinding communicates with the java part through the java jni interface and uses the corresponding native 7-Zip interface to perform operations. The java part introduces a cross-platform java interface of the 7-Zip library. The 7-Zip-JBinding consists of two parts: the java part and the native part.2.7.3 includes fixes for several reported security issues in 2.7.2: issue 13703 (oCERT-2011-003, hash collision denial of service), issue 14234 (CVE-2012-0876, hash table collisions CPU usage DoS. Python 2.7.3 was released on April 9, 2012. Release Date: ApNote: A newer bugfix release, 2.7.4, is currently available.Its use is recommended over previous versions of 2.7. If you fancy reading a book there is a couple on Amazon that I regularly see mentioned and recommend, O’reilly Unix Geeks and Unix Under the Hood both are designed for Mac OS X and take Terminal further.