The Electronic Entertainment Expo (or E3 for short) is a convention held early June each year at the Los Angeles Convention Center in California. Held Entertainment Software Association since 1995, the expo has various electronics companies, such as Nintendo, showcasing their latest devices and software.
Major E3 Nintendo Announcements
1995: Nintendo 64, Virtual Boy
1996: Super Mario 64
1998: The Legend of Zelda: Ocarina of Time
2001: Nintendo GameCube, Luigi's Mansion, Super Smash Bros. Melee
2002: Super Mario Sunshine, Metroid Prime, The Legend of Zelda: The Wind Waker
2004: Nintendo DS, The Legend of Zelda: Twilight Princess
2006: Nintendo Wii, Metroid Prime 3, Super Smash Bros. Brawl, Super Mario Galaxy
2007: Mario Kart Wii, Super Smash Bros. Brawl, Super Mario Galaxy
2009: New Super Mario Bros. Wii, Super Mario Galaxy 2, Metroid: Other M
Nintendo will be attending E3 2012 and participating in their annual press conference. The company is planning on fully unveiling their new Wii U console and will provide more details on upcoming Nintendo 3DS. The conference will take place on June 5th.