How did AC/DC get their name?

Malcolm and Angus Young developed the idea for the band's name after their sister, Margaret Young, saw the initials "AC/DC" on a sewing machine. "AC/DC" is an abbreviation meaning "alternating current/direct current" electricity. The brothers felt that this name symbolised the band's raw energy, power-driven performances of their music. "AC/DC" is pronounced one letter at a time, though the band are colloquially known as "Acca Dacca" in Australia. The AC/DC band name is stylised with a high voltage sign separating the "AC" and "DC" and has been used on all studio albums, with the exception of the international version of Dirty Deeds Done Dirt Cheap.