Emerson Electric sells automation equipment and services under two segments: intelligent devices and software control. Within software and control, it also holds a majority interest in AspenTech, an industrial software business, and owns a test and measurement business that was formerly National Instruments. Intelligent devices also holds Emerson's tools business, which boasts several household brands, like Ridgid. Emerson's automation business is most known for its process manufacturing solutions, which consists of measurement and analytical instrumentation, as well as control valves and actuators, among other products and services. Nearly half of the firm's geographic sales come from the Americas.