STC members have shown interest in being certified as technical communicators for at least 37 years. The Society has made at least four studies of certification. This paper reviews the work of the 1975-80, 1981, 1982-87 and 1994-1998 committees. The three, multi-year studies had essentially the same results; significant numbers want certification, but too few to make a full certification program economically viable. The studies also revealed that creating a certification program might be divisive. The 1982—-87 study revealed an interest by employers in STC having an accreditation program.