grc4f [79], like the other four-fermion generators, can generate all four-fermion final states through all possible electroweak four-fermion processes. However, it's structure is slightly different. It is based on the GRACE [80] system which automatically generates the matrix element in terms of the helicity amplitude. This means that the fermion masses are treated as non-zero. It contains the gauge boson widths and Coulomb corrections between the two intermediate W bosons. It also has initial state corrections, these are implemented in two ways. One is based on the electron structure function formalism, as for the other four-fermion generators, but it also uses a parton shower algorithm. All the C and P-conserving anomalous couplings may be switched on and set to any value. The CP-violating couplings may not be implemented.