A process for the preparation of amorphous atorvastatin calcium. The optical fiber consists of a dual-clad fiber having a longitudinally extending inner core, an outer core surrounding the inner core, and a cladding layer at least partially surrounding the outer core. The ink cartridge and the spring are mounted in the bracket. The load manager determines store process availability based on the received load information. The coil is electrically connectable to a property data analysis device. The material is a derivative of benzotriazole containing donor acceptor type conducting polymer which is soluble, fluorescent and can be used in LEDs, solar cells, electrochromic devices, smart windows and many other technologies.