Complement component 3, often simply called C3, is a protein of the immune system. It plays a central role in the complement system and contributes to innate immunity.
The Nokia C3-00 is a QWERTY keypad feature phone with Nokia Series 40 mobile operating system released under the Cseries line of phones by Nokia. It features a full 4-line QWERTY keyboard, like the earlier Nokia 6800 series.
Ísafold was an Icelandic newspaper, published weekly. It was founded in 1874 by the politician Björn Jónsson, who was the editor until 1909, when he became prime minister.
Ísafold was published until 1929, when it merged with Morgunblaðið.