Resumen
The article presents information on an open-source software for digital library, Greenstone. It is a comprehensive system for constructing and presenting collections of thousands or millions of documents, including text, images, audio, and video. Easily maintained, collections can be augmented and rebuilt automatically. Greenstone constructs full-text indexes from the document text and from metadata elements such as title and author. Indexes can be searched for particular words, Boolean combinations, or phrases and results are ranked by relevance or sorted by a metadata element. It creates all searching and browsing structures automatically from the documents themselves. Unicode is used throughout, allowing any language to be processed and displayed in a consistent manner. Only through international cooperative efforts will digital library software become sufficiently comprehensive to meet the world's needs with the richness and flexibility that users deserve.

Resumen
The article focuses on the gap between developed and developing countries in terms of information and communication technology and the measures to fill this gap with the help of digital libraries. Disaster relief, whether natural or man-made demands immediate and informed response in an environment where the local infrastructure may be unpredictable or severely damaged. Digital library technology can quickly create organized collections of information, graced with comprehensive searching and browsing capabilities. Digital library technology also opens new opportunities to enter the global marketplace. Developing countries have long undertaken low-level information-processing tasks. The varied demands of digital library development, such as manual metadata extraction, cataloging, and information presentation, greatly expands the range of tasks the developing world can undertake, creating valuable new export markets. Users should be empowered to produce digital library collections themselves, not just consume information produced elsewhere. Greenstone software incorporates a collection-building wizard that allows nonprogramming users to create and organize digital library collections. Digital libraries give computer professionals a golden opportunity to help reverse the negative impact of information technology on developing countries.