20 Apr 04. Engineering Systems Technologies (EST) has become a reseller of its HMD 120/40 Head Mounted Display. The HMD 120/40 uses the latest reflective LCD technology along with innovative optics to create a visually immersive experience for the user. EST is one of Europe’s leading distributors of Virtual Reality, Augmented Reality and Visual Simulation hardware and software. Based in Kaiserslautern, Germany, EST has over 10 years experience in the industry, with a vast knowledge base and proven levels of customer service.