Downie, Handley and Turner used various pseudonyms for their projects depending on who worked on them. The distinctions between the various pseudonyms may not be as clear cut as the following list suggests:
Ken Downie alone: Xeper, Discordian Popes, I.A.O.
Ed Handley alone: Close Up Over, Balil
Andy Turner alone: Atypic, Tura, Plaid (Andy alone for Bytes)
Turner + Handley: Plaid (on release other than Bytes)
Downie, Turner & Handley: The Black Dog
"Black Dog Productions" has been listed as the artist or remixer for individual tracks on several compilations.