PeakFit was originally developed by Ron Brown of AISN Software and distributed by Jandel Scientific Software in the late 1980s but by January 2004, Systat Software acquired the exclusive worldwide rights from SPSS Inc. to distribute SigmaPlot and other Sigma Series products.
Some statistical software packages like PSPP, SPSS and SYSTAT label the standardized regression coefficients as "Beta" while the unstandardized coefficients are labeled "B".