what are esta
Electronic System for Travel Authorization. The Electronic System for Travel Authorization (ESTA) is an automated system that determines the eligibility of visitors to travel to the U.S. under the Visa Waiver Program (VWP). ESTA was mandated by the Implementing Recommendations of the 9/11 Commission Act of 2007 for travelers from VWP countries arriving in the U.S. by air or sea.
Overview. 1  Engineering the Medieval Achievement (EMA) is a collaborative and multi-disciplinary effort to bring the contours of medieval technology to life for MIT undergraduates studying the development of the medieval economy, and/or the construction of medieval monuments.