Computations can be used in all programs as a shortcut to complex conditional expressions. In HotDocs, the computation variable must resolve to a True or False value. GhostFill uses Scripts. In GhostFill, you can set a variable to the value of a script computation, and then use it in an expression, or set the expression to test the value of a script. In DealBuilder, usage statements and computations are used to handle complex conditions.