I've got a Fortran 95 program (which basically does few calculations) and I'd like to use it online. So that, the users will input data into a HTML form, the program will run, and it will display the results. Would it be possible to do it in the following way? To run a little program (e.g. PHP) once the user submits the form, then that program would take the input values from the form and write them into a text file. Then it runs the Fortran program, which reads the input values from the text file and does all the calculations - outputting the results to another text file (and then back to the website). If that's possible, how do I put all these steps into one thing, so that they'll be executed one after another? Thank you very much for your help!