Tunneling or tunnelling may refer to: * Digging

tunnel A tunnel is an underground or undersea passageway. It is dug through surrounding soil, earth or rock, or laid under water, and is usually completely enclosed except for the two portals common at each end, though there may be access and ve ...

s (the literal meaning) **

Hobby tunneling Hobby tunneling is tunnel construction as a pastime. Usually, hobby tunnelers dig their tunnels by hand, using little equipment, and some can spend years or even decades to achieve any degree of completion. In some cases tunnels have been dug se ...

Quantum tunneling In physics, a quantum (: quanta) is the minimum amount of any physical entity (physical property) involved in an interaction. The fundamental notion that a property can be "quantized" is referred to as "the hypothesis of quantization". This me ...

, the quantum-mechanical effect where a particle crosses through a classically forbidden potential energy barrier *

Tunneling (fraud) Tunneling or tunnelling is financial fraud committed by "the transfer of assets and profits out of firms for the benefit of those who control them". In legal terms, this is known as a fraudulent transfer, such as when a group of major shareholders ...

, a fraud committed by a company's own management or by major shareholders *

Tunneling protocol In computer networks, a tunneling protocol is a communication protocol which allows for the movement of data from one network to another. They can, for example, allow private network communications to be sent across a public network (such as the ...

, transmitting one computer network protocol that is encapsulated inside another network protocol

See also