Sum 41 is a Canadian rock band from Ajax, Ontario. Originally called Kaspir, the band was formed in 1996 and currently consists of lead vocalist, guitarist and keyboardist Deryck Whibley, guitarist and backing vocalist Dave Baksh, guitarist, keyboardist and backing vocalist Tom Thacker, bassist and backing vocalist Jason “Cone” McCaslin, and drummer Frank Zummo.This is the complete discography of the Canadian rock band Sum 41. The band has seven full-length studio albums, three live albums, 26 music videos, one compilation, four EPs, nine B-sides, and 23 singles.Syed Sumail Hassan (Urdu: سمیل حسن ; born February 13, 1999), better known simply as Sumail, is a Pakistani professional Dota 2 player.Sulfatase-modifying factor 1 is an enzyme that in humans is encoded by the SUMF1 gene.Sulfatases catalyze the hydrolysis of sulfate esters such as glycosaminoglycans, sulfolipids, and steroid sulfates.SM U-41 or U-XLI was a U-27 class U-boat or submarine for the Austro-Hungarian Navy. U-41, built by the Austrian firm of Cantiere Navale Triestino (CNT) at the Pola Navy Yard, was launched in November 1917. When she was commissioned in February 1918, she became the last boat of her class to enter service.SM U-41 was one of the 329 submarines serving in the Imperial German Navy in World War I. U-41 engaged in naval warfare and took part in the First Battle of the Atlantic.