Instrument Quality Air. Compressed air supply that has been filtered of particulate and moisture.

Forming gas, a mixture of H₂ and N₂ gasses usually with 4% H₂ or less in the mixture.

Hydrogen gas; a concentration > 8% in air is considered explosive. For concentrations higher than 4%, FurnacePros requires inclusion of the Hydrogen Operation (HO) option to safely use hydrogen as a process gas in a furnace.

Input/Output signals as an aggregate.  IO is comprised of signals from one or more of these sources: AI (analog input), AO (analog output), DI (digital input), or DO (digital output)

Teflon. Components of Polytetrafluoroethylene (PTFE) - manufactured by DuPont as Teflon® or equal.