While the console was called the Sega Genesis in North America, the console was released to most of the rest of the world as the Sega Mega Drive. The reason for the change in name for the US is due to the trademark for "Mega Drive" being owned in the US by a company known as "Mega Drive Systems", which specialized in storage devices for computers.
The Genesis was the first SEGA console to have online play, but it was only compatible with a handful of games and the lifespan for the modem device was less than one year.
In 1994, Sega launched Sega Channel, a service where users could download 20 Sega Genesis games every month through their cable company's "On Demand" service. Sega Channel lasted until 1998, the end of the 16-Bit generation, preceding the Xbox Live Arcade by over 10 years.
The Sega Nomad was based on the semi-portable Sega Mega Jet, a Mega Drive system that was designed specifically for use on Japanese airliners.
Due to its ability to accept full Genesis cartridges, the Sega Nomad was the first handheld console to feature online multiplayer. It achieved this by utilizing the Gensis's XBâˆ€ND modem.