Microsoft's share of new server operating environment licence shipments grew from just under 42% in 2000 to nearly 49% in 2001, IDC said.
On the client side, Microsoft's already overwhelming 92% share crept up to 93% in 2001. IDC analyst Al Gillen attributes the company's continued growth to its licensing programmes and to customer transitions from older Microsoft products to its exisitng software.
The overall operating environments market rose 0.7% from 2000 to 2001, according to IDC, with most of the growth coming from increased licence revenue from client operating systems.
In the server OS market, Linux held its second-place position behind Microsoft in 2001, accounting for 25.7% of new licence shipments, according to IDC. Novell's NetWare captured 11.7% of the market, while Unix held a combined 11.6% and other products accounted for around 2%.