Arch Rock Corporation is a software, systems and services company, developing products that support wireless sensing and control networks. Arch Rock's vision is to expand the scope of the Internet to include the physical world by seamlessly integrating information technology systems and wireless sensor networks in the simplest possible manner. Arch Rock software creates a new class of computer system out of cost-effective, highly integrated, embedded hardware. Typical wireless sensor nodes, often called motes, consist of a simple processor, storage, a radio, possibly other communication links, a power source, and any of a wide range of sensors, such as temperature, pressure, vibration, motion, sound, contaminants, and contact. The technology underlying these nodes is rooted in longstanding forces driving the IT industry. The continual, dramatic advance in semiconductor chips known as "Moore's Law" has provided the billions of transistors that form powerful desktops and servers, but it also has made rich functionality available within the cost and form-factor constraints of embedded microcontrollers. Furthermore, the sophisticated manufacturing techniques that put a million transistors on a dollar's-worth of silicon are now used to create other kinds of devices, including CMOS radios and MEMS sensors. Thus, while the personal computer shrinks into the cell phone and PDA, creating the wireless client, the embedded microcontroller is growing up into a new class, the wireless server --- serving the world's information.