Sleipnir as the creator of Ásbyrgi, in works of art, literature, software, and in the names of ships. In the "Poetic Edda", Sleipnir appears or is mentioned in the poems "Grímnismál", "Sigrdrífumál", "Baldrs draumar", and "Hyndluljóð". In "Grímnismál", Grimnir (Odin in disguise and not yet having revealed his identity) tells the boy Agnar in verse that Sleipnir is the best of horses ("Odin is the best of the Æsir, Sleipnir of horses"). In "Sigrdrífumál", the valkyrie Sigrdrífa tells the hero Sigurðr that runes should be cut "on Sleipnir's teeth and on the sledge's strap-bands." In "Baldrs draumar", after the Æsir convene
Legged Squad Support System was approximately the shape and size of a horse. A stereo vision system, consisting of a pair of stereo cameras mounted into the 'head' of the robot, was integrated alongside a light detecting and ranging (LIDAR) component in order to enable it to follow a human lead and record intelligence gathered through its camera. The initial contract for the Legged Squad Support System was awarded to Boston Dynamics on December 3, 2009. The continued evolution of the BigDog led to the development of the LS3, also known as AlphaDog. The contract schedule called for an operational demonstration of two units