Azide is a chemical compound, consisting of three nitrogen atoms in a linear structure, connected by double bonds.
To be perfectly clear: Project Azide does not use the actual chemical azide in any way; it's just our code name.
Azide's chemical formula is N3, hence the official abbreviation of Project Azide is PN3
Our logo is inspired by a diagram of azide's linear structure:
(Those are double bonds, not equal signs, between the three nitrogen atoms.)
All that said, azide is a fascinating (and incredibly powerful) substance: