However gases can also be known by their uses or industries that they serve, hence "welding gases" or "breathing gases", etc. ; or by their source, as in "air gases"; or by their mode of supply as in "packaged gases".
Namun, gas juga dapat diketahui berdasarkan penggunaan atau industri yang mereka layani, maka muncul istilah "gas pengelasan" atau "gas pernapasan", dan lain-lain; atau berdasarkan sumbernya, seperti pada "gas udara"; atau berdasarkan cara pemasokannya seperti pada "gas kemasan".