Academic users can obtain CHARMM by contacting The CHARMM Development Project.
For-profit companies should contact Accelrys Inc.

Below is the standard reply to inquiries for the CHARMM program.

We distribute the source code of the CHARMM program with documentation to individual academic research groups for a $600 licensing fee. CHARMM runs on a variety of UNIX workstations. No graphics are necessary.

The license is issued to the head of a laboratory or research group. Please send a letter with the full name and title of the professor in charge of your group and formal mailing address. Describe briefly the kind of research for which you intend to use the CHARMM program and the computers you will be using. The letter should be addressed to:

        The CHARMM Development Project
        Professor Martin Karplus
        Department of Chemistry & Chemical Biology
        12 Oxford Street
        Harvard University
        Cambridge, Massachusetts 02138
        U. S. A.