Re: HP15C LE Price Lowered by HP Message #18 Posted by Jeff O. on 6 Feb 2012, 7:48 a.m., in response to message #16 by Marcus von Cube, Germany
Marcus,
My understanding is as follows:
The difference between 4CY and CNA as the leading three characters is explained here.
The eight digits break down as follows: digit 1 is the year, digits 2 and 3 are the week, and the last five are an individual unit number. With the 15c LE, there are only 7 characters after the factory ID, with only four characters for the unit number. Since they now use alpha as well as numeric characters, four characters allows a total of 1,679,616 individual ID strings as compared to 100,000 strings with 5 numbers, so four characters is probably enough.
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