1967
1977"DFT" PREFIX
Mike Wiener
c.1973David Doernberg
1979/80/84
1980
1983
1985
1985
1979Mike Wiener
1983"DFT" PREFIX
1986"DFT" PREFIX
Mike Wiener
1987"DFT" PREFIX
Lee Madigan
1987
1992Lee Madigan
1994Mike Wiener
1994Lee Madigan
1994Lee Madigan
1996
1993
Jon Cohen
1994Lee Madigan
1997Lee Madigan
1997Joe Pugliese
1998Lee Madigan
1999
2001
2006Jeff Fazekas