LEd (formerly LaTeX Editor) is a TeX/LaTeX editing software working under Microsoft Windows. It is a freeware product.

Ice (, Lyod) is a 2002 novel by the Russian writer Vladimir Sorokin. The story is set in a brutal Russia of the near future, where the Tunguska meteor has provided a mysterious cult with a material which can make people's hearts speak. The book is the first written part of Sorokin's Ice Trilogy, although the second part in the narrative; it was followed by Bro in 2004 and 23,000 in 2006.

A light-emitting diode (LED) is a two-lead semiconductor light source. It is a p–n junction diode, which emits light when activated. When a suitable voltage is applied to the leads, electrons are able to recombine with electron holes within the device, releasing energy in the form of photons. This effect is called electroluminescence, and the color of the light (corresponding to the energy of the photon) is determined by the energy band gap of the semiconductor.