NExS (Network Extensible Spreadsheet) is an interactive spreadsheet designed specifically for the X Window/Motif environment. NExS features a fast spreadsheet engine, Excel and Lotus support, and more than 230 built-in mathematical, statistical, financial, string, date and time functions, and thirteen 2-D and 3-D graph types to support engineering, scientific, and business applications. The NExS API allows the spreadsheet to interact with other applications running on the same workstation or over a network.