From Wikipedia: Telarium Corporation (formerly Trillium) was a subsidiary of Spinnaker Software. The corporation was founded in 1984 and went defunct in 1987. The headquarters were in Cambridge, Massachusetts, USA. President of Telarium was C. David Seuss, the founder and CEO of Spinnaker Software.
Telarium published eight adventure games. The games belonged to the genre of interactive fiction with graphics. One game (Shadowkeep) was also a role-playing video game. They were based on works of literature in the literary genres science fiction, fantasy, crime fiction and legal drama. Often they were developed in cooperation with established writers.
Source: Wikipedia, "Telarium," available under the CC-BY-SA License.