Abstract: A system for guiding economic driving may include a vehicle generating driving information in accordance with driving. A vehicle management server is configured to receive and store vehicle information and driver information of the vehicle from the vehicle. A vehicle terminal configured to store the vehicle information and transmit the driving information. A business management server is configured to generate economic driving evaluation information according to a preset economic driving algorithm using the driving information.

Abstract: A method and system for controlling safety of a bi-fuel vehicle may safely control the bi-fuel vehicle when it is in an accident. The method may include detecting a pressure of a vaporizer configured to decompress and vaporize liquefied petroleum gas (LPG) that is one fuel of the bi-fuel vehicle, determining whether the detected pressure of the vaporizer is equal to or higher than a predetermined high pressure, determining whether the detected pressure of the vaporizer is equal to or lower than a predetermined low pressure, determining whether an airbag has been inflated, and switching to a gasoline mode configured to use gasoline if at least one of the detected pressure is equal to or higher than the predetermined high pressure, the detected pressure of the vaporizer is equal to or lower than the predetermined low pressure, and/or the airbag has been inflated is determined to be true.

Abstract: An apparatus and method for changing electronic book (e-book) contents in an e-book system are provided. The method includes displaying e-book contents on a display unit, identifying at least one first information to be changed in the e-book contents, identifying change information for changing the first information, and, collectively changing the first information in the e-book contents according to the change information.