Message files preferably comprising MPEG video messages are provided to transaction terminals for display of non-transaction messages to users during a terminal transaction. The aluminum extrusion forms at least one thermal chamber. The container is then repressurized with a gas such as nitrogen, argon, helium or neon so that long term storage may be possible. The lens carrier is configured for accommodating the lens. The readout unit reads out pixel signals of a row of pixels in column order of the pixel array during a horizontal readout period, except during a readout-standby period that is within the horizontal readout period, and suspends reading out the pixel signals of the row of pixels in the column order during the readout-standby period. The system automatically provides the test identification codes to those test subjects taking a test, and provides the test subject with access information and instructions for using the system to take the test.