Many variations of SAFT have been developed since the 1990s, including HR-SAFT (Huang-Radosz SAFT), PC-SAFT (perturbed chain SAFT), Polar SAFT, PCP-SAFT (PC-polar-SAFT), soft-SAFT, polar soft-SAFT, SAFT-VR (variable range), SAFT VR-Mie. Also, the SAFT term was used in combination with cubic equations of state for describing the dispersive-repulsive interactions, for example in the Cubic-Plus-Association (CPA) equation of state model and the SAFT + cubic model and non-random-lattice (NLF) models based on lattice field theory.