What does NONUM stand for?

MLA style: "NONUM." Acronym Finder . 2013. AcronymFinder.com 22 May. 2013 http://www.acronymfinder.com/Notional-Number-(NONUM).html
Chicago style: Acronym Finder . S.v. "NONUM." Retrieved May 22 2013 from http://www.acronymfinder.com/Notional-Number-(NONUM).html
APA style: NONUM. (n.d.) Acronym Finder. (2013). Retrieved May 22 2013 from http://www.acronymfinder.com/Notional-Number-(NONUM).html

Notional Number

This definition appears very rarely

Other Resources:

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Non-Nuclear, Biological, and Chemical North of Panhandle Neighborhood Association (San Francisco, California) National Organization of Nurse Practitioner Faculties National Organization of Nurse Practitioner Faculty Non-Revenue Passenger Notification of New Substances Non-ST Elevated Myocardial Infarction Nonsubmarine Northern Ontario Native Tourism Association Not Included in Technical Service Demand Stockage Lists		Not Old Not Young Naval Oceanographic Office Nevada Operations Office Non-Owner Occupied (loan type) Notice of Opportunity Number of Operations New Orleans Opera Association North Okanagan Organic Association (Falkland, British Columbia, Canada) [not an acronym] Newbie (a new person; often used pejoratively) None of Our Business

Samples in periodicals archive:

So really, giving you some notional number is pointless.

It is not a target, which would simply be the notional number of parking tickets that a parking attendant would be asked to produce.