is a database of Feynman amplitudes. Amplitude["name"] returns the amplitude corresponding to the string "name". A list of all defined names is obtained with Amplitude. New amplitudes can be added to the file "Amplitude.m". It is strongly recommended to use names that reflect the process. The option Gauge 1 means `t Hooft Feynman gauge; Polarization 0 gives unpolarized OPE-type amplitudes, Polarization 1 the polarized ones.