Barence writes "More than eight out of ten Mac owners also own a PC, according to a new piece of research. The NPD survey found that 12% of US computer-owning households have a Mac. However, 85% of those also own a Windows PC, suggesting that the Mac/PC divide is nowhere near as clear cut as both Apple and Microsoft suggest. Mac owners are also far more likely to have multiple computers in the house. Two thirds of Mac owners have three or more computers in the home, while only 29% of PC owners have two or more PCs."