1. A method in a computer automated data processing system for identification, management and retrieval of engineering drawings in digital format wherein all the digital data is analysed by the central processing unit in accordance with predefined algorithms to identify individual engineering drawings and specific information contained within each said drawing and wherein the said specific information may be stored in accordance with predefined criteria in a suitable storage means and wherein each said drawing may be identified and located by using an appropriate search engine to search the storage means against said the predefined criteria.