The cassette label started by Zan Hoffman in 1984 as an extension of his mail art activities. It was first called ZIDSICK (short for "Zanstonean International Distribution Service's Independent Cassette Kvmpeni"). There were sublabels for different activities, like “Elevation of Anxiety” for collaborations with Minóy, “Fragrant Complications” for compilations, “Delegated Obscurities” for works removed from the ZIDSICK list but still available. The label name changed to Zidslick in the late 1980s up until the early 1990s, before reverting back to a shorter "Zidsic" (removing the "k") in the 1990s.
The ZH27 label is the current incarnation of this cassette label and has reissued "Zidsick", "Zidslick" and "Zidsic" cassettes on CDr.
See also Not On Label (Zan Hoffman Self-released) for early Zan Hoffman releases without any associated label information.