了解NetBSD

　　Examples of NetBSD embedded systems range from the useful (routers and switches) to the bizarre (a NetBSD toaster). The variety of architectures commonly used in embedded systems far exceeds common choices for traditional computers, so portability is vital.

　　NetBSD's small footprint, ease of portability, and BSD license make it a perfect choice for embedded systems. The small footprint is extremely important, as most embedded systems have a small amount of memory. Therefore, the operating system must be as thin as possible. Ease of portability significantly cuts development time to bring new products to market, which is key to staying ahead of competitors. The BSD license allows companies to build commercial products based on NetBSD and sell them for a profit while keeping the source code proprietary.

　　The BSD license

　　The BSD license is a big factor in corporate decision making when an organization is choosing NetBSD (or other BSD variants) over Linux for commercial products. The Linux kernel and most Linux software is released under the General Public License (GPL), which requires the release of the source for all modified codes. In contrast, the BSD license allows companies to modify and sell NetBSD code without releasing the modified source, thereby allowing companies to keep intellectual property close to the vest while leveraging open source software for the base of their product.