The following uses for oxygen are gathered from a number of sources as well as from anecdotal comments. I'd be delighted to receive corrections as well as additional referenced uses (please use the feedback mechanism to add uses).
- oxy-acetylene welding
- frequently used to aid respiration of patients in hospitals
- used in making methanol and ethene oxide
- rocket fuel oxidant
- steel manufacture
- ozone (O3) in the atmosphere is protection against the sun's ultraviolet rays