Unrestricted open-source Java implementation of the PPM (prediction by partial matching) algorithm for text and data compression by Bob Carpenter. Builds with ant.

Detailed narrative fully describes how a file is actually deflated, or compressed to get rid of redundancy - and save space.

From PC Webopedia definition and links.

Provides brief overview of shape compression, run-length encoding, and Lempel-Ziv.

Basic facts, algorithms, hardware, links, and a glossary.

Pseudocode for a spare matrix compression algorithm.

Explanation of compression and various compression schemes at eLook Computing Reference.

Data Compression issue of ACM Crossroads, the student magazine of the Association for Computing Machinery.

Describes the compression and decompression algorithms used by PKZIP.