In Steins;Gate , Okarin gives some of his projects operation names, such as "Operation Urd".
He mentions that the names he has given them don't really mean anything, but looking at what the names are referencing, it seems otherwise.
Urd (or Urðr), Verthandi(Verðandi) and Skuld are a trio of Norns that are described as deciding the fates of people. They represent Past, Present and Future respectively. These reflect the time-travel theme of the show
There are ones that I haven't been figured out, such as Operation Eldhrimnir (episode 10) and Operation Valkyria (episode 18). How do these Norse Mythology references fit into the show (and any other ones i may have missed) ?