MontaVista Software, the Santa Clara supplier of embedded Linux operating systems and development tools, said it has raised $21 million in funding led by Siemens Venture Capital. Also participating were NEC, Alloy Ventures, US Venture Partners, Aplix and others, the company said.

Venture Development Corporation (VDC) estimates that worldwide shipments of embedded/real-time and mobile application operating systems, bundled tools, and related services totaled over $1 billion in 2005, and by 2008 will reach $2 billion, the company said.

Siemens is a customer of MontaVista's.