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Jeff_#
Jan 07, 2002, 10:34 PM
I put together some links to some good sites that might be able to help you with your problem.

Compression Pointers (http://www.internz.com/compression-pointers.html)
Find books on data compression as well as confences and other useful information.

The Data Compression Library (http://dogma.net/DataCompression/)
Coding, confrences, zipping, you name it, this site has a link!

Data-compression.com (http://www.data-compression.com/)
Everything from the theory of compression to Vector Quantization.

Archive comparison test (http://www.compression.ca/)
Compares the many different compression algorithms compression performance against each other on a standardized set of data files.

Compression page (http://www.compression.f2s.com/)
Find the latest and most efficient data compression programs on the market today.

Crusher! (http://www.dcmicro.com/)
Toolkits for dos.

Quantamail (http://www.quantamail.com/)
Secure, encrypt, and compress your mail.

Data Compression and Encryption Algorithms (http://www.cs.uiowa.edu/~jones/compress/)
Splay Tree Based Codes.

The mathematics of data compression. (http://www.spie.org/web/meetings/calls/sd98/conf/sd87.html)
Image compression, data compression, a conference.

Data Compression with Built-In Encryption (http://www.autosophy.com/datacomp.htm)
Ways to compress and encrypt.

Data encryption techniques (http://catalog.com/sft/encrypt.html)
More ways of keeping your data safe!

Data compression FAQ (http://www.cs.ruu.nl/wais/html/na-dir/compression-faq/part1.html)
Everything you ever wanted to know about data compression.

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Jeff_#
Jan 10, 2002, 07:06 PM
From something I found on the Web I thought might be of use.

Data Compression and Data Compaction

Many people do not know the difference between Data Compression (DTACPR) and Data Compaction (COMPACT). For the AS/400, data compression refers to data compression that is performed by the system. Data compaction refers to when the tape drive compresses data. When performing a Save, you may choose to use either data compression or data compaction, but only certain quarter-inch tape drives support data compaction.