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The " Testing " practice area defines several levels and types of testing . " We were very disappointed about T-Online 's decision to stop serving Overture search listings , placing the German ISP in serious breach of contract at several levels , " said Nick Hynes , Overture Europe 's president and managing director , in a statement . The interdependence that unites us can be reflected at several levels of human activity . Provide multiple training sessions at several levels , in convenient locations . We are trying to streamline the divisions , the classifications of several levels , in regards to travel advice .