[simoncion]

> The Duo launched in July the same year. Pentium D was released in May 2005, as was Athlon 64 X2.

Multi-socket machines predate these processors by at least ten years. Windows NT 4.0 (first released in 1996) had multiprocessor support, as did Linux 2.0 (also released in 1996).

If you don't want to bother verifying this information, gut-check it. Ask yourself: "Why on earth would the Masters work on adding SMP to Erlang have started in 1997 if there weren't already working computers that could have benefited from SMP? And would it have made any sense to do this work if those sorts of computers hadn't already been around for a while?"