Artifact Details Title HI button Catalog Number E1218 Type Physical object Description "HI" is printed on the front of the button and "HOUSTON INSTRUMENT GRAPHIC PLOTTERS & ANALOG RECORDERS AUSTIN, TEXAS" is printed on the back of the button. Manufacturer Houston Instrument Graphic Plotters and Analog Recorders Dimensions 1/4 x 2 1/4 x 2 1/4 in. Category Ephemera/Button