At the White House, copies of documents marked “classified” or the even more secret “compartmentalized” or “codeword” can circulate among officials there with proper clearance.

Source: https://www.wnd.com/2023/02/mystery-americas-secrets-gone-awol/

"I mean, you go all the way back, and they've had a ton of them, but they've proven that they could overcome most of them in the compartmentalized season of fractional bullpening.

Source: https://www.foxsports.com/stories/mlb/john-smoltz-can-the-tampa-bay-rays-approach-work-in-the-postseason

Since then, Porter has compartmentalized his emotions and channeled his energy into basketball.

Source: https://www.lamarledger.com/2023/02/24/michael-porter-jr-nuggets-tragedy-coban-porter/