GTCO

GTCO Corporation is a corporation producing interface devices including digitizers, graphics tablets and audience response systems.

GTCO was established in 1975 in Rockville, Maryland by two graduates of the Stevens Institute of Technology in Hoboken New Jersey . In 1985, GTCO moved to its current location in Columbia, Maryland. GTCO Corporation patented the first electromagnetic digitizer. In 1995 GTCO acquired the assets of Science Accessories Corporation, who manufactured a line of Sonic (Sound) type Digitizer. The most interesting model was the GP-12 or Freepoint which was a 3D Digitizer. In 1998, GTCO acquired the assets of Kontron Gmbh. In 1999, GTCO acquired the assets of CalComp Input Technologies, which itself had previously acquired Talos and Summagraphics Corporation, which had acquired Houston Instruments. With the acquisition of CalComp Input Technologies, GTCO began doing business as GTCO CalComp Inc.

AgC Technology, a division of GTCO CalComp, has over 30 years of experience with conductive ink printing. Though the company specializes in conductive ink printing, graphic ink printing services are provided when part of an integrated project.

Carbon dioxide equivalent

Carbon dioxide equivalent (CDE) and Equivalent carbon dioxide (CO₂e) are two related but distinct measures for describing how much global warming a given type and amount of greenhouse gas may cause, using the functionally equivalent amount or concentration of carbon dioxide (CO₂) as the reference.

Global warming potential

Carbon dioxide equivalency is a quantity that describes, for a given mixture and amount of greenhouse gas, the amount of CO₂ that would have the same global warming potential (GWP), when measured over a specified timescale (generally, 100 years). Carbon dioxide equivalency thus reflects the time-integrated radiative forcing of a quantity of emissions or rate of greenhouse gas emission—a flow into the atmosphere—rather than the instantaneous value of the radiative forcing of the stock (concentration) of greenhouse gases in the atmosphere described by CO₂e.

The carbon dioxide equivalency for a gas is obtained by multiplying the mass and the GWP of the gas. The following units are commonly used: