Category talk:NA-importance articles

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What does it mean NA? It should be an explanation here. --Catalaalatac (talk) 00:02, 17 May 2011 (UTC)
 * It's a common acronym - n/a means not applicable, i.e., no importance assessment is needed. Avicennasis  @ 09:33, 14 Iyar 5771 / 18 May 2011 (UTC)