A method and system are provided for sending text messages in a telecommunication network, in particular in an intelligent network, allowing charge acceptance, wherein a subscriber is allowed to send text messages, which have already been charged for and which are then made available to the relevant recipient either predestined with an address or freely available. During normal running, the oxygen storage amount of the first three-way catalyst is computed based on the detected air-fuel ratio, and the air-fuel ratio of the engine is controlled based on the computed oxygen storage amount so that the oxygen storage amount of the first three-way catalyst is a target amount. The annotation process is performed in background, hidden from the user, as the user conducts normal searches. Notably, the first plate and the mesh screen remain stationary while the second plate is dynamically displaced between open and closed positions relative to the first plate and the mesh screen respectively. reducing the ambient pressure while avoiding application of sufficient heat to power a phase transition. A preferred embodiment of the graphics memory system uses two memory controllers, with each memory controller accessing its own frame buffer.