Toshiba was No. 1 in the second quarter, according to IDC, as Compaq grapples with the same inventory issues that hurt Toshiba.
Toshiba moved back into the No. 1 position, after one quarter as No. 2, with 18.8 percent market share, or 273,000 units shipped. Compaq took a little over 13 percent of the market with 190,000 units shipped, according to an upcoming report from market research firm International Data Corporation.
Rounding out the top five notebook vendors, in terms of units shipped, were Dell, with 187,000 units, IBM, with 149,000 units, and Packard Bell NEC, with 71,000 units.
Making a return appearance to the top 10 notebook vendors was Apple, who is also enjoying considerable sales growth in its desktop line, due to overwhelming demand for the recently released iMac.
"Apple shipped 48,000 units," Dahlquist said. "They're coming back to a respectable position."