1) General subject: code, signal book, ticker, pattern
2) Aviation: coded designator, name-code
3) Military: code book, code key, identifier
4) Engineering: code pattern, designator, indicator, logical number, prefix (города, зоны), reference designation (напр, детали в каталоге), word, digits (в телефонии)
5) Mathematics: cypher
6) Railway term: cipher key
7) Law: secret language
8) Economy: code number
9) Telecommunications: system of notations
10) Physics: cypher key
11) Electronics: digit
12) Information technology: cipher, coded character set, coded representation, fdf (ааа), key
13) Special term: signal-book
14) Astronautics: identification number
15) SAP. abbreviation
16) Sakhalin energy glossary: account (ACCT)
17) Automation: number, reference number
Универсальный русско-английский словарь. Академик.ру. 2011.