Glossary entry (derived from question below)
French term or phrase:
N.I.S.
English translation:
Statistical Identification Number (NIS)
French term
N.I.S.
Répertoire du Commerce 33 S 33333 – N.I.S. 3333 C 33333
There are plenty of hits for NIS, but none seem to fit the context.
| 4 +1 | Statistical Identification Number (NIS) |
Thomas T. Frost
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| 4 +1 | Statistical Identification Number |
Chakib Roula
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| 5 | Statistical Identification Number |
Jean-Pascal Nkuibo
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| 3 +1 | See explanation |
pooja_chic
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Non-PRO (1): Catharine Cellier-Smart
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Proposed translations
Portugal
‘Very good precision work’ – Comunica.dk
Native in: Danish (Variant: Standard (rigsdansk)) 
, English (Variants: UK, British)
Works in: Danish to English, English to Danish, French to Danish
Statistical Identification Number (NIS)
Two other official Monaco sites pop up in Google, but as soon as one asks for the English version, they go belly-up:
http://www.monacostatistics.mc/Procedures-and-services/NIS-r...
http://en.service-public-entreprises.gouv.mc/Starting-a-busi...
Google's snippets confirm the English version, though.
The NIS is not just a company register number but also contains the NAF code corresponding to the type of activity.
Algeria
Shedding light out of words
Native in: Arabic , French
Works in: Arabic to French, Arabic to English, French to English, and 3 more.
Statistical Identification Number
http://en.service-public-entreprises.gouv.mc/Starting-a-busi...
http://coi.2.ires.pl/en/portal_inwestycyjny/investor_guide/the_statistical_identification_n/
| agree |
BrigitteHilgner
: You were the first person to provide an explanation in French - I think that was most important.
5 hrs
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Thank you for your sportsmanship.
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Germany
Reliable, accountable, friendly, timely
Native in: French 
Works in: German to French, German to English, Italian to French, and 6 more.
Statistical Identification Number
I can only confirm what others have previously said: it is an abbreviation for the French "Numéro d'Identification Statistique". Thomas has mentioned the official website providing information about it in English. For French, check http://www.imsee.mc/Demarches-et-Services/Attribution-NIS
Translation is depth of the passion
Native in: English
Works in: French to English, English to French, Portuguese to English
See explanation
N. I. S. (Numéro d’Identification Statistique :Identification Number)
http://www.monacoforfinance.mc/en/living-in-monaco/settling-...
STEP 2: RECEIVING YOUR IDENTIFICATION NUMBER
The Numéro d’Identification Statistique (N.I.S.) [Identification Number] is issued to each economic entity (individuals, companies or organisations) by the Institut Monégasque de la Statistique et des Études Économiques [Monaco Institute of Statistics and Economic Research] (IMSEE) in order to define its main area of activity.
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Note added at 6 hrs (2016-02-13 21:00:23 GMT)
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http://www.ericsson.com/res/thecompany/docs/suppliers/invoic...
Discussion
http://www.elmouwatin.dz/?Inscription-au-Numero-d