The followinguses for helium are gathered from a number of sources as well as from anecdotal comments. I would be delighted to receive corrections as well as additionalreferenced uses.

• filling balloons (blimps) as it is a much safer gas than hydrogen
• widely used as an inert gas shield for arc welding in countries where helium is cheaper than argon
• protective gas in growing silicon and germanium crystals, and in titanium and zirconium production
• cooling medium for nuclear reactors
• a mixture of 80% helium and 20% oxygen is used as an artificial atmosphere for divers and others working under pressure
• cryogenic applications
• as a gas for supersonic wind tunnels
• a protective gas for semiconductor materials
• pressurizing liquid fuel rockets