A wireless telephone engine, smart-card engine and Personal Digital Assistant engine are integrated in a single device, wherein an address book is shared by the wireless telephone engine and PDA engine. The positioning transmitter system includes at least four light sources and a master anchor to modulate the light sources to emit modulated light signals each having a modulation frequency. An adaptive voltage sensing circuit senses when the core power supply voltage to the core circuitry falls below a threshold level and generates a voltage-low signal. The distance between the susceptor and work coil is repeatedly analyzed based upon the power converter’s input energy, and the work coil is driven at a repeatedly corrected power level during the heating cycle. The hybrid particles often have a core-shell morphology, with the polyurethane being concentrated in the shell and the polymer being concentrated in the center of the particle. A method of making the article having an anti-glare surface includes, for example, forming a protective film on selected portions of at least one surface of the article; contacting the at least one surface with a liquid etchant; and removing the protective film from the surface of the article to form the anti-glare surface.