An elementary file is part of the smart card file system that contains application data See also DF (dedicated file), MF (master file)
Energy factor is a standardized measurement of the annual energy efficiency of water heating systems EF is the ratio of energy output to energy consumption of a water heater, expressed in equivalent units, under designated operating conditions over a 24-hour use cycle
Envelope follower A wah effect that is controlled by how hard or soft you play You may also use it with a continuous controller pedal to create a wah pedal effect
ejection fraction; the percent of the left ventricular volume that is ejected in one cardiac contraction; stroke volume divided by ventricular end-diastolic volume
Trade, industrial, agricultural or crafts exhibition, fair or similar show or display; exhibition organized for a charitable purpose or to promote learning, art, craft, sport, scientific or cultural activity, to promote friendship between peoples, religious knowledge or worship Does not include exhibits for private purposes in shops or premises with a view to selling
Extremely Fine A coins that exhibits very little sign of circulation, with only minimal marks or faint wear, which are only evident upon very close scrutiny