APPLIED CONCEPTS (dba Stalker Radar) was founded by Alan Mead in 1977. Their Chess Computer products were distributed by an American marketing/retail enterprise "Chafitz", and by a German manufacturer/distributor "Sandy Electronic".
Detailed Museum records and historical inventory records share this manufacturer room. When an original inventory entry matches a detailed record, the detailed Museum record is canonical.
This manufacturer room is a documentation view. Individual physical machines, including duplicate examples, are tracked in the separate specimen registry.
This list is migrated from the preserved original website. Entries already documented in the Museum link to their detailed record; the remaining entries now have a modern historical-catalogue page while the original source stays untouched.
Historical source: Original Applied Concepts page.