1. Introduction
2. Document Preprocessing
   1. Lexical Analysis of the Text
   2. Elimination of Stopwords
   3. Stemming
   4. Index Terms Selection
   5. Thesaurus
3. Document Clustering
4. Text Compression
   1. Motivation
   2. Basic Concepts
   3. Statistical Methods
      1. Modeling
         1. Compression Models.
      2. Coding
         1. Huffman Coding.
         2. Byte-Oriented Huffman Code.
      3. Inverted File Compression
      4. Dictionary Methods
   4. Comparing Text Compression Techniques
   5. Trends and Research Issues
   6. Bibliographic Discussion

With N. Ziviani