This is probably HN's tech background speaking. In the enterprise dev world, everyone knows what BDD means just like every dev out there knows what OOP means.

What is SAOD? Do you mean SOAD?

Severe Acronym Overload Disorder.

Funny enough, Google's overview box also suggests soad: "SAOD (or SOAD) most commonly refers to the rock band System of a Down"

Thanks. (That’s what it suggested for me as well. Clarifying that I meant in the context of software, it suggested a misspelling of SOAD - Service-Oriented Analysis and Design.)