oligopoly in the electronic goods market.
It seems to be difficult for the smaller companies to grow business in the electronic goods market, such as mp3 player, printer, electronic dictionary, cell phone, digital camera etc... For these market, the technology is improving rapidly, therefore, the company need to invest huge money in reserch and development. Besides, the lower priced goods from the bigger company attract a lot of customers who like the familiar brand. It's an oligopoly