Who is N/A?
N/A (or sometimes n/a or N.A.) is a common abbreviation in tables and lists for the phrase not applicable, not available, not assessed, or no answer. It is used to indicate when information in a certain table cell is not provided, either because it does not apply to a particular case in question or because the answer is not available. Such a notation can be used on many different types of forms. The notation was in use at least as early as the 1920s, with a 1925 guide to conducting community surveys instructing those asking questions for the survey: Some of the questions on the card are of course not applicable at all times. For instance, a household composed of two widowed sisters living on their income has no wage earner. The survey director should request that the initials "n a" ("not applicable") be written down opposite such questions. No space should be left blank. The guide goes on to indicate that every blank should be filled, even if only to indicate that the blank is not app...