In response to the emergence of other gaming systems designed with a 16-bit architecture, such as NEC Home Electronics' PC Engine and Sega's Sega Genesis, which offered improved graphics and audio systems compared to the NES, Uemura designed the Super Family Computer (Super Famicom)  which was released in late 1990. The first batch of 300,000 consoles sold out within hours. The following year, as with the NES, Nintendo released a modified version of the Super Famicom for the U.S. market, named the Super Nintendo Entertainment System  SNES, or Super Nintendo. Some of the initial games available for this console were Super Mario World, F-Zero, Pilotwings, SimCity, and Gradius III. By mid-1992, over 46 million Super Famicom/SNES consoles had been sold, with its lifespan lasting until 1999 in the United States and 2003 in Japan.