Increased shipments of Power Macs and PowerBooks are partly responsible for the revenue rises outlined in Apple's fourth-quarter financial results, according to the company's Data Summary for the quarter.

Unit sales of both product-lines were significantly higher than those in the year-ago quarter. Power Macs, which made up the largest single segment of Apple's revenue for the quarter – $419 million of $1.2 billion in revenue related to CPU sales – saw sales increase 26 per cent from 176,000 in Q4 2002, to 221,000 in Q4 2003.

The introduction of the Power Mac G5 saw a 66 per cent increase in Power Mac sales from 133,000 in quarter-three.

There was 203 per cent year-on-year growth in PowerBook sales, totaling 176,000 units for the quarter and $348 million in revenue. Last year just 58,000 PowerBooks were sold. PowerBook G4 sales grew by 9 per cent in the period.

IDC analyst Roger Kay said: "I think Apple was a big participant in the upswing we've seen in demand for notebooks."

Apple chief financial officer Fred Anderson attributed slow sales of 12-inch iBooks to "cannibalization" from 12-inch PowerBook G4 sales.

iBooks suffered for the quarter, both sequentially and year on year. A total of 137,000 iBooks were moved in the quarter, down 28 per cent compared to the previous quarter, and down 25 per cent for the same quarter a year ago. iBooks added $154 million to Apple's revenue.

iMac sales were also affected. Although totaling $279 million in quarterly revenue – with 253,000 iMacs sold – this was down 12 per cent on the previous quarter, and 20 per cent down on year-ago quarter.

Q4 2003 was the iPod's strongest quarter yet, with 336,000 units sold, totaling $121 million in revenue. This is an 11 per cent rise on the previous quarter, and 140 per cent higher than Q4 last year, when just 140,000 iPod's were sold.

Increased demand in Europe Europe is showing signs of increased demand. Apple moved 158,000 units in Europe for the quarter, compared to 144,000 for Q3 2003 and 136,000 for the Q4 2002. In total, Apple made $323 million from European sales.

A total 787,000 units were sold worldwide, bringing Apple $928 million in revenue. The Americas continues to be Apple's biggest geographical region, with 453,000 sales, but little change has been seen sequentially and sales were down 3 per cent compared to this time last year, when 467 units were sold.

Sales in Japan improved 27 per cent compared to Q4 2002, but slid sequentially. Last quarter saw 85,000 units shipped, compared to 76,000 in Q4 2003 – an 11 per cent drop, though Apple showed a 2 per cent improvement in revenue.