Here are some key features of WebMO: Users draw structures in a 3D java editor, run calculations, and view results, all from their web browser; All administrative tasks (user accounts, job time limits, etc) are performed through a web browser interface; No software to install on the client. WebMO is installed only on the single web server that runs the computational chemistry programs; Simple enough for undergraduate computational chemistry curriculum; Flexible enough for computational chemistry research; Support for Gaussian 94, Gaussian 98, MOPAC, MOPAC 2000, and GAS; Fragment library to speed up entry of large or complex molecules; Import existing XYZ, MOL or PDB structures directly into the editor; Works fully with Netscape 4.07+ (PC, unix), IE 4.0+ (PC, unix), and HotJava 3.0+ (PC, Macintosh).