Removes instructions that will not affect the behaviour of the program, for example definitions which have no uses, called dead code.

Some viruses use something called polymorphic code to change their signature every time they move.

The country calling code of Turkey is 90.

Satellite phones are usually issued with numbers in a special country calling code.

Historically, +7 was used as the country calling code for all of the Soviet Union.

The country calling code of Serbia is +381.

This is the reason why digital computers talk in a language called binary code.

The country calling code of Bosnia and Herzegovina is +387.

The country calling code for Croatia is +385.

I wouldn't call it code of ethics, exactly.