Full Text Retrieval Search techniques in ZyLAB software include Boolean, Proximity, Quorum, Key field, Date, Number, Synonym, Concept, Similar, Progressive and Fuzzy The success of true full-text retrieval systems is based on an underlying principle that the best way to find information in a document is to use the document itself rather than relying on partial representations you get by using key fields or manual indexes. In ZyLAB's unique full-text retrieval system, every word in every archived document automatically becomes part of a general index, which means that every document is fully searchable. This index is optimized to allow extremely fast access to all documents that contain a certain word or expression.Over the years, ZyLAB has developed a full set of full-text search techniques based on broad criteria such as words, phrases, wildcards, Boolean expressions, (directed and non-directed) proximity, quorum, key fields, dates, numbers, synonyms, concepts, similarities and progressive and fuzzy search. All of these criteria can be used in relation with each other and are supported by several forms of relevancy ranking. ZyLAB's full-text retrieval technology is driven by its very efficient word and character encoding algorithms, which directly result in the unparalleled speed for which the ZyLAB software is known.