DADiSP 6.7 is an engineering spreadsheet designed specifically for technical data analysis. It supports native 64-bit execution on all Windows 64-bit operating systems. Large memory access, optimized numerics and buffered based data management provide performance gains of 15 to 240 percent over previous versions. The spreadsheet offers streamlined CSV, text and binary data import. A common timebase can be assigned multiple input series, and the results can be plotted individually in separate windows or combined into a single stripchart display. Vendor-specific data import modules provide specialized support for many common industry text and binary file formats. The application extends the Series Processing Language to support standard programming constructs. SPL’s C/C++ syntax offers a familiar programming style allowing users to create custom routines using well understood programming techniques.