qsi corporation is a manufacturer of rugged handheld, panel-mount and pedestal-mount terminals for industrial oems and commercial vehicle systems integrators. qsi's human machine interface (hmi) and mobile data terminal (mdt) products include character and graphic terminals that are programmable, customizable, ce certified and nema 4/12/13 rated. numerous interfaces are available, including eia-232, eia-422, eia-485, j1708, ethernet and power-over-ethernet. qsi excels at designing and building custom and semi-custom terminals able to withstand high levels of shock, vibration, humidity and other environmental parameters. all qsi corporation products are manufactured in the usa at the company's headquarters in salt lake city, utah.