olemus
numberkoodid tüüpfraaside esituseks kõnesides, eeskätt politseisides
= brevity codes used to represent common phrases in voice communication, particularly by law enforcement

ülevaateid
https://en.wikipedia.org/wiki/Ten-code
http://www.njsoa.org/pdfs/tencode.pdf
https://copjot.com/blogs/news/police-10-codes-explained