?: Its a series of "box-drawing characters" from the Unicode or Extended ASCII character set. They're used to create simple diagrams and pictures in contexts where only text based displays are supported – for example in the BIOS options of many computers.
This is a list of symbols found within all branches of mathematics to express a formula or to represent a constant.
This symbol is barcode
I can not understand it completely. It is something like hexadecimal code or latin symbols.
These are bar codes, these are printed on products, helps to easily generate a bill
symbol is a way.
The international symbol for cocaine
It is a Bar Code.
Barcode for a Dildo bought at Adult XXX Shop
some sort of bar codes