The electronic copy of the extensive thesaurus has been issued, by virtue of the cooperation of three Arab institutions namely: Abdul Hamid Shuman, Jordan; Dubai municipality and Jumm'ah Al-Majid cultural center in Dubai. This issue came as an output of successful efforts are tangible facts.

Professor Tahira Al-Hashimi, head of Technical Processing Section, at Library Dept., Dubai municipality, declared that the thesaurus is trilingual (Arabic/ English / French). Professor Mahmoud Ahmad Ateem, expert of thesauri building, has supervised the compilation and editing of the thesaurus's phrases and idioms.

Printed copy of the thesaurus was issued in 1996, in three volumes. Today the electronic copy is being issued after updating; with a strong belief of the necessity for the computing of Arab technical articles due to computerization process which covered the whole library and information sector. Information in this thesaurus has been segmented into (27) facets; it included (11852) inscribers in each language; it also included (37031) transformers from inscribers not in use in Arabic.

Jasim Mohamad Jergis, Asst. Secretary of Jumm'ah Al-Majid center for culture and heritage in Dubai, pointed out that thesauri are considered one of the essential tools that libraries and info. Centers depend on in the process of subjective depiction of information contains.

Thesaurus is simply a list of idioms in a science or group of sciences, such idioms are presented within a pyramidical entourage reflecting relation between general and individual and the most private. Importance of thesauri has emerged in the prevailing environment of specialized scientific thinking; the thing which necessitated the availability of a specialized scientific rationing tool which could be used in subject depiction of specialized intellectual output, the thing which facilitates its retrieval by beneficiaries.

Despite thesauri importance in general, Arab library lacks such very important tool, the reason behind such lacking is due to their need for collective institutional efforts because they are cost-effective in the preparation thereof; they also need work teams in order to properly reflect the dealt with subjects.

He added that thesauri always lean towards specialization in one subject or another. Yet the extensive thesaurus appeared to be comprehensive in its coverage, establishing an equilibrium between subjective comprehension enacted by the generalization and in depth processing enforced by strict specializations.

Thus, the electronically shaped thesaurus is usable by bibliography, compilation and indexing in public libraries, specialized, private, university and even school libraries. Besides, searching in it for phrases and idioms is carried out in a simple way, which enables both librarian and beneficiary to get acquainted with.

Searching in this thesaurus provides pyramidical display of the phrases and idioms, to look up any word in any place; it also provides the search in the thesaurus's three languages, yet any phrase or idiom could be transferred to any library indices as depicters of library assets.