Introduction     IEC – ASTM- UL – DIN- CEN – ASME – BS – ISO – UL – DIN EN – IEEE – CENELEC – DIS - BS EN – ANSI – TIA – NEC – EIA- OSHA -DIN ISO – DPC – PAS – AENOR –CSN – ILNAS – NFPA –PrEN – CEN/TR – ETSI – ENV-BS ISO – NFC - CEN/TS – ICT – DIN EN ISO – FDIS – ASHRAE - ……. Etc.   All above abbreviations are the names of different standards, codes, and