[AceyMan]

Back in the pre-internet era this is how bulletins and vital memos were handled in the airlines.

There were a couple of binders in the office for these & everyone had to sign-off on any new documents on their first duty shift since the doc was posted.

(Part of my job was to check the sign-offs and then tap the shoulder of any laggards to say, "Stop what you are doing and go read the bulletins. Now.")