From Perplex City Wiki
Mind Candy is a company...
- Named on the Perplex City Postcard
- Abbey Road clues point that 'MC' is a place.
- Scarlett Kiteway often mentions "Adrian/Michael/the guys from MC", and usually talks about contacting them (including through e-mail). Seems to indicate that MC is the location/organization of Sente's and the Academy's contacts on Earth.
- Parcel Letter confirms 'MC' stands for 'Mind Candy', a Earth-based company helping Sente with the recovery of The Cube.