|Product Name||Ipad Pu Leather Executive Carrying Cacse + Ipad Car Charger + Ipad Screen Protector (Black)|
|Category||Electronics / Photography|
|Short Description||1.00 CA|
|Amazon.com||Buy on Amazon ~ B003T1P4JY|
|Features||Safely carry your iPAD with this faux leather carrying case. Interior of the case is lined with felt for added protection. Carry and protect your ipad with this Pleather Flip Case . This Stylish Pleather case lets you carry you iPad wherever you go. Padding protects your iPad from bumps, scratches, and every day wear and tear. Interior is soft felt. An excellent solution for your daily travel and protection needs for your iPad Package includes screen protector for your iPad. Clear type Screen Protector protects the screen on your Apple iPad. Prevents scratches, dirt, dust and buildup from accumulating on your screen. Tailored to exact shape and dimensions of the iPad. Does not interfere with viewing or touch-screen operation * Easy to apply * Compatible with Apple iPad Package includes car charger suitable for iPad. Car charger cigarette lighter adapter suitable for Apple iPad with Dock Connector. Plugs into car's 12V cigarette lighter adapter to keep your iPad powered when you are on the go. Enhanced internal circuitry to manage charging status, prevent over- and under-charging and protect against voltage backflow to car's electrical system. Integrated LED power indicator with electrical fuse to prevent damage to iPad, battery or car's electrical system. Input: DC12-24V, Output: DC5V, max 2000mA|
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Article of interest
ISBN stands for International Standard Book Number. Originally this was a 10 digit number known as ISBN-10, but has been replaced with a 13 digit version known as ISBN-13 (aka EAN-13) to better fit in with the industry standard product numbering system.
The ISBN system offers a unique numbering system for books and publications of various types. ISBN offers 9 identification digits for each book or publication and one check digit. ISBN-13 expands the available number set by doubling the available numbers. You might think that the extra three digits would more than double the available numbers but ISBN is limited within the EAN-13 numbering system and will always start with 978 or 979 as the first three digits, leaving only 9 more digits for the actual identification digits and again the last digit is the check digit.
Any ISBN-10 number can be converted to ISBN-13. Any ISBN-13 number that starts with 978 can be converted back to ISBN-10. ISBN-13 numbers that start with 979 cannot be converted to ISBN-10.
The conversion process from ISBN-10 to ISBN-13 is a rather simple one. Start with the first 9 digits of the ISBN-10 number, place 978 in front and calculate the new check digit using the standard EAN check digit calculation.
If you want to calculate the check digit for ISBN-10, that is done using a MOD-11 calculation that is very different than the EAN check digit process.
- Lets start with ISBN-10 number 1-5905-9332-?
- Each digit is multiplied by its position for digits 1-9
- 1x1 + 5x2 + 9x3 + 0x4 + 5x5 + 9x6 + 3x7 + 3x8 + 2x9 = 180
- Now get the remainder 180 mod 11 = 4
- Now return the mod 11 again... 4 mod 11 = 4
- If the results is 10, return the letter X otherwise return the digit.
- For our example, the final number is 1-5905-9332-4
Look at the number above and below the barcode. You will see that except for the last digit in the ISBN number, all of the digits exist in the 13 digit version shown under the barcode right after the 978 and just before the new check digit of 5.
Now you can see how easy it is to convert between ISBN-10 and ISBN-13.