Answer
The Sinclair ZX80, released in 1980, holds the distinction as Sinclair's maiden voyage into the realm of mass-market home computers. This pioneering device ushered in an era of computing accessibility, captivating enthusiasts with its compact size, budget-friendly price, and innovative design. Equipped with a mere 1 kilobyte of memory, the ZX80 laid the groundwork for subsequent advancements in personal computing.