The growth of these six businesses came at the expense of the 'Others' category, which presumably contains the shrinking PC businesses of Sony and Samsung. Overall the market shrunk again, although not as drastically as in previous quarters.
What is more interesting is the heavy reliance of two of the big players on the US market. Apple sold 45% of its Macs in the US. Dell more than 40% of its PCs. As these are number two and three in the US market that's a worryingly heavy concentration of sales in one economy.
With the holiday buying season in the next quarter and the heavy bias towards consumers in Apple's product line, you'd expect Q4 to produce even better results for the Mac.