There has been worldwide interest in looking at using artificial intelligence technology for legal applications. In this orientation, an Expert System Application in Iraqi Law (ESAIL) attempts to provide a means to manipulate an Iraqi law domain which is one of the most popular areas in Iraqi's real life world. The system explains its conclusions by applying the law text associated with. ESAIL is a rule-based system which stores its knowledge in an external data base and its uses the B+rJree indexing method for retrieval from the data base. In its present form, ESAIL deals with a restricted domain in the laws related to the Iraqi personal status law, with its various sections. ESAIL deals with two types of users: the professional lawyers who have unrestrected access to the system during the input of new laws and modifications by an interactive procedures; while ordinary users have access only to the use of the system, without being able to enter or modify laws. ESAIL was implemented using Turbo Prolog program language on an IBM compatible PC, under MSDOS (version 5.0) with Arabic operating system support. The system was put through priliminary tests by a professional lawyer and initial results are encouraging.