He returned to school to enroll in the University of California at Berkeley, for which he received a BS in EECS in 1958, focusing on electronics design.

The ANTIC and CTIA[9] were created with enhanced capabilities compared to the TIA but the project was altered from a video game console into what would become the Atari 8-bit computers.

Due to clashes with management over this and other decisions, Miner left Atari before the release of the computers and found his way into the medical world.

In 1979, Miner was approached by David Morse, vice president from Tonka Toys, about starting a new company to create video game hardware without the oversight of a large corporation.

Jay Miner agreed to take control of engineering on two conditions: that the design be a computer, and that it be a 16/32-bit system built around the Motorola 68000 CPU.

Miner's last electronics job was at the company Ventritex, operating medical instrumentation and designing chips which controlled a cardiac defibrillator.

While he worked at Atari, Mitchy even had her own employee ID badge with number 000, and an embossing of her paw print is inside the Amiga 1000 top cover, alongside staff signatures.