A way of counting part-time employees. It involves relating the working hours of a part-time employee to the working hours of a full-time employee on a unitary basis. A full-time employee corresponds to 1 FTE and a 50% part-time employee counts as 0.5 FTE. For example, two 50% part-time employees equal one full-time employee (FTE = 0.5 x 2 = 1).

An index designed to monitor the ethical, environmental and social performance of individual companies. The selection of the firms included in this index is entrusted to an independent body, the Advisory Committee, which works on the basis of the data provided by a British research institute, the Ethical Investment Research Service (EIRIS).

Electrochemical devices that convert chemical energy into electrical energy; they are classified according to the electrolyte used in the process. Various fuels may be used (natural gas, hydrogen...).