EXA E&C is a company specializing in the professional construction and electronic parts manufacturing industries. It operates through Clean Room, Interior Finishing, Interior, Partition, and Crystal Devise business units. The Clean Room division is engaged in the construction of industrial and bio clean rooms for electronics production plants, precision machinery production plants, metal and nonmetal manufacturing plants, and others. The Interior Finishing division provides final finishing work inside the building to educational and research facilities, offices, knowledge industry centers, data centers, residential facilities, etc. The Interior business unit offers design, architecture, graphics, construction management, and other services. The Partition department delivers a full partition system using mono-block technology. The Crystal Devise division specializes in manufacturing temperature-compensated crystal oscillators (TCXOs), voltage-controlled crystal oscillators (VCXOs), crystal units, etc.