Diffen âº Technology âº Computers âº Software. Freeware is copyrighted computer software which is made available for use free of charge, for an unlimited time. Authors of freeware often want to give something to the community, but also want to retain control of any future development of the software.
A nonmetal, sulfur is the 10th most abundant element in the universe, according to the Jefferson National Linear Accelerator Laboratory. Today, it's most common use is in the manufacture of sulfuric acid, which in turn goes into fertilizers, batteries and cleaners.
Oxygen and sulfur are the two most important members of this family of elements. Oxygen makes up about 20% of the air. Oxygen is found in so many natural compounds that it is the most abundant element in the earth's crust. Oxygen is commercially obtained from the fractional distillation of liquefied air.