The present invention relates to an at least single-layer, biaxially oriented film support for magnetic recording media which is predominantly composed of crystallizable polyester, having a thickness in the range from 1 to 40 m. Further disclosed herein is a keyboard for a computer, comprising a plurality of keys, a cover with the keys protruding therethrough, a base supporting the cover and the keys, and at least one selectable mass wherein the mass is selected from a plurality of masses, a movable mass supported by the base and movable relative to the base, and a driving transducer supported by the base. The lens has an incident surface receiving light from the LEDs, and an exit surface from which the light goes out, being expanded. The frequency-shifted Stokes radiation generated in the first Raman cell, along with the residual pump laser radiation, is applied to a second Raman cell whose pressure is adjusted to maximize production of the anti-Stokes sidebands. As the account balance gets low, the local risk management module may query the central risk controller for the additional risk account balance.