1 : A method for performing calculations in a distributed networked environment, comprising: updating a source element on a first computer; sending a calculate update signal in response to the updating, specifically directed to a target calculated element for updating on a target element computer that may be the first computer or a second computer connected to the first computer that uses the source element in a calculation; obtaining the updated source element by a process on the target element computer associated with the target calculated element in response to the sending; and performing a calculation to update the target calculated element using the obtained updated source element.