1d Lookup Table. Allows for interpolation between (x_i, y_i). 1D polynomial type. f(x) = a_n * x^n + a_(n-1) * x^(n-1) + ... + a_0 Stores a list of 1D functions to allow cascading - f( g( h(x) ) ) etc For generic math operations on single variables like sin, cos, exp, log etc