Ahhh...that vagaries of the human language. What one means, how they say it, and how it gets interpreted doesn't always equal each other.

"I was one of the two people who developed the bulletin board – E mail circulation system from which this present bulletin board and the Yahoo EarthWaves boards both evolved."

So, you are referring to a specific bulletin board system that also discussed earthquake predictions. The way you wrote your sentence led me to believe you were taking credit for developing bulletin board systems in general, which WOULD have been a grandiose claim.

Brian