He's had a top-secret clearance since 2021 and access to sensitive compartmentalized information in a job that requires a lifetime binding nondisclosure agreement.
Moss emphasized that there were additional " compartmentalized levels of access" sometimes put above top secret, known as Sensitive Compartmented Information and Special Access Programs.
These are the bottom five layers of the Open System Interconnection (OSI) model, a conceptual framework for compartmentalizing all these different network processes.
So, the decks, the below deck, a couple of them are basically just wide open. They're not compartmentalized. They don't have watertight doors or anything like that.
To compartmentalize and hide complexity, programming languages can package pieces of code into named functions, also called methods or subroutines in different programming languages.