Arabic-Portuguese dictionary   Subject Number of entries Microsoft 17.470 International Monetary Fund 12.978 Environment 5.776 Mathematics 3.641 Electronics 2.658 Statistics 2.542 Radio 1.764 Lighting other than cinema 1.317 Antennas and waveguides 1.284 Electric traction 952 Electric motors 913 Telecommunications 897 Radiology 886 Telegraphy 877 Electricity generation 757 Power lines 712 Automatic control 698 Vacuum tubes 685 Magnetics 679 Thermal Energy 656 Isolation 587 Sound recording 534 Reliability 508 Rail transport 483 Power system protection 478 Electric machinery 465 Piezoelectric crystals 456 Physics 411 Semiconductors 342 Radiobiology 338 Electrical engineering 320 Computer networks 313 Telephony 307 Cables and cable production 302 Power electronics 271 Transformers 222 Accumulators 200 Satellite communications 199 Video recording 158 Welding 153 Metrology 117 Wind Energy 105 Ecology 73 Printed circuit boards 36 Ultrasound 32 Name of organization 17 Pest control 4 Obsolete / dated 3 General 1 Economics 1 Book binding 1 Geriatrics 1.347 Legislative acts 1.348 Nigeria 1.349 Total: 69.623