A method, computer-readable medium, and apparatus for providing ready-to-dial global phone numbers is provided. The invention also relates to intermediates useful in preparation of indane acetic derivatives and to methods of preparation. The RDC compatible check image may pass through a server and may be encrypted. According to the invention, the light source comprises a plurality of clusters of light-emitting diodes having different light-emission wavelengths, the clusters being arranged at a pitch P with respect to each other. The invention is further directed to control of mist formation during SO3 absorption, and of the sulfuric acid mist content of the gas stream leaving the SO3 absorption step in a process wherein SO3 absorption energy is recovered from absorption acid in useful form. Due to the configuration described above, the driving controllers supply a drive voltage and a drive control signal to actuators connected thereto.