Gold's superior electrical conductivity, its malleability and resistance to corrosion have made it vital to the manufacture of components used throughout a wide range of electronic products and equipment including computers, telephones and home appliances. Gold has extraordinarily high reflective powers that are relied upon in the shielding that protects spacecrafts and satellites from solar radiation and in industrial and medical lasers that use gold-coated reflectors to focus light energy. And because gold is biologically inactive, it has become a vital tool for medical research and is even used in the direct treatment of arthritis and other intractable diseases.

• COMPUTERS/SEMICONDUCTORS :
The most important use of gold is as a fine wire that connects circuits to the semiconductors, or the "brain" of the computer.


• POWERCHAIRS :
Computerized wheelchairs, called powerchairs, allow disabled patients further control over their movements and a renewed sense of independence. A tiny microprocessor is connected to the wheelchair's controls by gold wire and gold -coated connector pads.


• TELEPHONE WALL JACKS
: Because gold conveys a superior signal, and does not corrode or tarnish, it is used to coat billions of contacts for phone jacks and connecting cords.


• ASTRONOMY
:Gold is used to coat the telescope's secondary mirrors because of its high reflectivity or infrared light.


• DENTISTRY :
Most gold used in dentistry is in the form of alloys, which are mixtures of gold and other metals, such as platinum, palladium, silver, copper and zinc for crowns, bridges, inlays and dentures.