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USSD on a Sony Ericsson mobile phone (2005). Unstructured Supplementary Service Data (USSD), sometimes referred to as "quick codes" or "feature codes", is a communications protocol used by GSM cellular telephones to communicate with the mobile network operator's computers.
In 2018, Giffgaff was a runner-up in the Best Utilities Provider of the Year Awards. [49] In 2019, Which? reviewed 13 mobile network's customers. Giffgaff was rated the best network by the sample surveyed. [50] Since 2016, Giffgaff has regularly won the uSwitch Network of the Year award for 5 consecutive years.
A modification of Lagged-Fibonacci generators. A SWB generator is the basis for the RANLUX generator, [19] widely used e.g. for particle physics simulations. Maximally periodic reciprocals: 1992 R. A. J. Matthews [20] A method with roots in number theory, although never used in practical applications. KISS: 1993 G. Marsaglia [21]