chicken & fish/bandeng
A bar code for pH doesn't exist.
Nope - the bar-code is simply an identifier mark to define what's being sold.
Disregard the first and last bar, they mark the beginning and end of the bar code. Each digit in a bar code is made up of 2 tall and 3 short bars, starting with the second bar read 5 bars as 7,4,2,1,0. which ever numbers has the tall bars add them to get the first digit of the bar code. 7 and 4 is 0.
There are handheld bar code scanners, so a handheld bar code scanner is a bar code scanner, but a bar code scanner is not necessarily a handheld scanner. There are bar code scanners in store checkout stands that are fixed, and there may or may not be an associated handheld scanner there for the clerk to use to scan, say, a large bag of dog food that the customer doesn't want to hoist up onto the counter.
A bar-code reader.
A bar-code reader.
Bar codes have a meaning because the meaning of a bar code is assigned to that bar code. A bar code identifies an item, and product information regarding that item is held in a data base.
The level of measurement of a bar code is nominal.
"bar code" contains 7 letters.
The country code and area code of Bar, Montenegro is 382, (0)85.
Basically, you can download them directly to their phone by scanning a QR code or by typing the shown Checkout link on their phone's browser, then land on a page where to find more information about the products you are about to download. That's really wonderful.
Americium is not used in bar code scanners.