The html document makes no explicit mention of Chime. Netscape looks up the MIME type of the file in its internal plug-in table and finds that it must run Chime. Netscape hands the pdb, spt or other supported file to Chime. It may be compressed with a program named gzip to save Internet transfer time. When Chime receives it, Chime detects that it has been gzipped and gunzips it automatically.
Chime renders the image of the molecule.
The calculation of each image occurs entirely within your PC, by Chime, which has the atomic coordinates stored in your computer's memory. No Internet transfers occur while you are rotating or otherwise modifying the molecular image. The images themselves are never transferred through the Internet. If the commands are specified within the web page html, no further Internet transfers are needed. Feedback to Eric Martz .