What is "microvision"

The MicroVision is the very first handheld game console that used interchangeable cartridges. It was released by the Milton Bradley Company in November . The MicroVision was designed by Jay Smith, the engineer who would later design the Vectrex gaming console. The MicroVision's combination of portability and a cartridge-based system led to moderate success, with Smith Engineering grossing $15 million in the first year of the system's release. However, very few cartridges, a small screen, and a lack of support from established home video game companies led to its demise in .