The original program pdViewer was written by Howie Robinson and Antony Crofts to allow molecules with coordinates available in the format of the Brookhaven Protein Data Bank (1, 2) to be viewed on personal computers of the IBM PC family. This new version of the program has been substantially rewritten for operation under Windows 3, using the Microsoft Visual Basic programming environment.

The new program contains many enhancements, and a much more friendly user interface. All operations are menu-driven, and mouse activated. Most operations are intuitively obvious, but the program contains Help menus for most functions, which provide explicit instructions for all major operations, allowing the program to be used without a manual. The material provided here is an amplification of that in the Help functions, with some additional information about general operation, installation, the Brookhaven Protein Data Bank, ancillary files, etc.