In the US N.A.S., the NOTAM system is a constant stream of notices getting created, updated, and expired, on topics of airports (big and small), navaids, airspaces, and more. They frequently use awkward terminology and obscure acronyms.
Yet I cannot remember the last time I saw a typo or mistake in a NOTAM.
This leads me to believe they are not just manually typed in by individual creators across the nation.
What kind of process is there for the creation of NOTAMs that provides this extreme consistency and high quality, and total lack of typos or mistakes?
(the "worst" NOTAM mistake I ever found was a TFR that was centered on a VOR, but the VOR had been shutdown about a year earlier. As soon as I brought it to the attention of the local office, it was updated.)