This week, both IDC and Gartner released their PC sales figures for the first quarter of 2010. The results were incredibly positive. Averaging the numbers, as I've done for several years now, we get the following market share data:

Worldwide PC sales, Q1 2010: 81.7 million units
Growth (YOY): 25.8 percent

Top PC vendors, worldwide:
1. HP - 15.45 million units (19.3% market share)
2. Acer - 11.4 million units (13% market share)
3. Dell - 10.35 million units (12.9% market share)
4. Lenovo - 7 million units (7.6% market share)
5. ASUS/Toshiba (tied) - 4.6 million units (5.55% market share)

US PC sales, Q1 2010: 17.5 million units
Growth (YOY): 18.6 percent

Top PC vendors, US:
1. HP - 4.45 million units (26.25% market share)
2. Dell -  4.1 million units (24.8% market share)
3. Acer - 2.5 million units (13% market share)
4. Toshiba - 1.45 million units (7.65% market share)
5. Apple - 1.25 million units (7.5% market share)

As usual, I'll use these numbers to determine Apple's worldwide PC market share when the company releases its quarterly results next week.