SPAM - Single PArticle Mover Version 0.0 Vahid Vahedi and I wrote the first version of SPAM when I took an class from Ned Birdsall as an undergraduate. Many versions of this code exists, including one written in PostScript(r), where the orbit of the particle is calculated by the printer as it prints (still my favorite). The goal of this program is to demonstrate basic particle behaviors in a variety of external fields. As it stands now, the program supports the E x B drift, I don't know if I will add more drifts because the performance of this program is less than satisfactory :(. (There should be an applet above this line. If there is not, you may be using a browser which does not support applets.) Acknowledgements The graphics and the controls came from the Java Virtual Wind Tunnel by Dr. David Oh.