Internal links let me connect readers to related content in other chapters, and external links let us send them to outside sources of supplemental information or to an online retailer.

FORBES: Interactive E-book Aims to Simplify Wine

The molecules of this protein are more or less globular, and are held in that shape by internal cross-links between different parts of the amino-acid chain of which the protein is composed.

ECONOMIST: Monitor

Each customer site links its own internal network to the Telseon system through a single dedicated switch, a far simpler route than the clumsy path of the old telephone system.

FORBES: Weaving The Perfect Net

Meanwhile, the US government has reached internal agreement on a policy document that for the first time links reconciliation with the US military withdrawal in 2014.

BBC: Asia

Canada claims the passage, which links the Pacific and Atlantic Oceans, runs through its internal waterways.

CNN: China eyes Arctic options in energy, transport

The men, all arrested between December 9 and 24 under the Internal Security Act, were members of the Jemaah Islamiyah -- a clandestine Islamic Group with links to other Southeast Asian nations.

CNN: Leaders slam terror plotters

An internal network, called Kwangmyong, exists that connects universities, libraries and net cafes but it has no international links.

BBC: North Korea expands net presence