Question: What was the email system released by the owners of the Perkins Estate in the 1980s called?
Sentence (from "Perkins Estate"): The property was part of the summer estate of the Cabot family, originally belonging to Thomas Handasyd Perkins; the present main mansion house was built in the 1850s to a plan by Edward C. Cabot for his sister-in-law, Elizabeth Perkins Cabot.
Relevant evidence: No