The Full Form of EAI is‍ Enterprise Application Integration.

Enterprise application integration (EAI) is the task of uniting the databases and workflows associated with business applications to ensure that the business uses the information consistently and that changes to core business data made by one application are correctly reflected in others.

EAI initiatives can either be driven by or drive changes in both these areas. New applications may require new database and workflow connections, and a general business decision to adopt application modernization, cloud computing or business process modernization will typically involve EAI changes to both areas. The most common drivers of EAI are a desire to support mobile workers, organizational goals to optimize internet and e-commerce use and efforts to fully exploit cloud computing.