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Jack, In my previous reply I said that "second" wasn't included in the base-units database because that database wasn't designed to hold names. I was mistaken. The name "second" is in the base-units database -- as are all the names of the base units of the SI unit system. The alias"sec" isn't in the base-units database because that name isn't part of the SI unit system. It is, however, a common abbreviation, which is why it's in the common-units database. Regards, Steve Emmerson Ticket Details =================== Ticket ID: PIK-524714 Department: Support UDUNITS Priority: Normal Status: Closed =================== NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.