To whom it may concern: on UNIX there is a new version of "gd" available (9503) and older versions have been renamed ( gd old = 9412, gd = 9501, gd new = 9503 ). - gd PostScript files should now work flawlessly with "xfig", - ticin/ticout is now handled the same way as in the old SATANGD, - gdescr bug for H2:-data fixed. - External user fit functions (at present only C-subroutines, FORTRAN interface is under construction ) can be used to fit data marked in a header line to be fitted, e.g: H: x y,fl d% A sample fit function can be found on GSI's central AIX and HP cluster in /usr/local/lib/gd/tutorial/usrfct.c Note that the subroutine name *must* be "usrfct". You compile and link a user function "usrfct.c" with: gdfct usrfct You use it with: gr / dsn(...data set...) gd / poly(-1) fmy usrfct f (the poly(-1) suppresses the automatic polynomial fit) - Archives of the gd-package (the program, tutorial, HTML docs, README) are available on AIX under /d/bio/kraemer/GD/GD.* as tar'ed and compressed files for a couple of popular UNIXes (AIX, HPUX, Sun, Linux, ... ). good luck, mk