Wavelength References will introduce a low-cost miniaturized hydrogen cyanide gas that it says provides asolute accuracy of HCN gas lines better then 0.1 pm and is directly NIST traceable. These lines cover the entire C-band. Wavelength references also offers gas cells of all types as well as lasers locked to gas absorption lines. It will also introduce a locker box that can be used to lock a tunable laser to any gas line in the built-in gas cell(s). The box can also be used to calibrate the laser against the built-in gas cells.