Scientific and measuring equipment, namely, metrology stands specifically adapted for optical and portable precision measurement instruments and devices for measuring distance, length, and alignment; adjustable platforms specifically adapted for holding metrology equipment and instruments for measuring distance, length, and alignment; downloadable computer programs for operating and reporting information from precision measurement devices and instruments for measuring distance, length, and alignment; metrology targeting components, namely, target holders manufactured for laser trackers for measurement purposes; length reference and scaling artifacts, namely, length reference products in the nature of instruments for measuring distance and length, length measuring gauges and scaling products in the nature of calculating scales, and optical tooling scales for measuring distance; field testing products used in conjunction with electronic precision three-dimensional measuring instruments, namely, laser tracker field calibration systems consisting of industrial calibration sensors, calibration blocks for calibration, and optical emission spectrometers