Polish-Serbian dictionary   Subject Number of entries Accumulators 324 Cables and cable production 345 Computer networks 343 Ecology 95 Economics 8.879 Electric machinery 335 Electric motors 1.271 Electrical engineering 518 Electricity generation 1.075 Electronics 1.145 Fish farming pisciculture 378 Ichthyology 297 Isolation 187 Lighting other than cinema 124 Magnetics 385 Mammals 55 Mathematics 3.285 Metrology 189 Microsoft 2.170 Ornithology 60 Patents 152 Power electronics 351 Power lines 333 Power system protection 352 Printed circuit boards 75 Radio 2 Risk Management 85 Statistics 42 Thermal Energy 974 Transformers 307 Ultrasound 45 Vacuum tubes 911 Total: 25.089