Tunable receivers and techniques for receiving an electrical oscillator signal in the RF, microwave or millimeter spectral range based on photonics technology to use both photonic or optical components and electronic circuit components. The component has an airfoil portion with a plurality of internal cooling passages and a non-linear trailing edge. The system also allows contacts of the user to make corrections to their contact-related information contained in the user’s address book, request reciprocal contact information from the user, deny the user access to additional or corrected contact-related information and take other actions relative to managing the contact-related information which others have about them. Robust speech recognition systems can be built by automatically generating a \u201cshadow\u201d DTMF application.