sugtar is the oldest version of the tar implementation from John Gilmore I could get hold of. I fetched it in december 1987 from the SEX machine (Software Exchange machine) at the Sun User Group meeting in San José CA. It may help to understand the historic background of the GNU tar program. At least it shows that before PDtar/SUGtar was adopted by FSF/GNU in 1989 it really _did_ implement a subset of the POSIX tar standard. Hoever, it looks af if nobody at FSF was interested in making GNUtar POSIX compliant because the autumn version if the POSIX draft did not really change until the final POSIX-1003.1