<P> Java also introduced a whole family of archive extensions such as jar and war (j is for Java and w is for web). They are used to exchange entire byte - code deployment . Sometimes they are also used to exchange source code and other text, HTML and XML files . By default they are all compressed . </P> <P> Archive files often include parity checks and other checksums for error detection, for instance zip files use a cyclic redundancy check (CRC). RAR archives may include redundant error correction data (called recovery records). </P> <P> Archive files are sometimes accompanied by separate parity archive (PAR) files that allow for additional error detection and recovery, particularly in recovery of missing files in a multi-file archive . </P>

Meaning of achieve a r c h i v e