From Halopedia, the Halo wiki
Daedalia Technology is a Martian firm well-known for the seeding and development of artificial intelligences for corporate and military markets, such as the United Nations Space Command. On January 7, 2530, Daedalia Technology activated the second-generation "smart" AI Serina. Serina was their greatest work of that era, an omni-capable AI that displayed both impressive intellectual capacity and remarkable computational efficiency.
Daedalia Technology is named for the Daedalia Planum, a relatively featureless plain on Mars that the firm is presumably located at.