<Table> Linux kernel <Tr> <Td_colspan="2"> Tux the penguin, mascot of Linux </Td> </Tr> <Tr> <Td_colspan="2"> Linux kernel 3.0. 0 booting </Td> </Tr> <Tr> <Th> Developer </Th> <Td> Linus Torvalds and thousands of collaborators </Td> </Tr> <Tr> <Th> Written in </Th> <Td> C and assembly </Td> </Tr> <Tr> <Th> OS family </Th> <Td> Unix - like </Td> </Tr> <Tr> <Th> Initial release </Th> <Td> 0.01 (17 September 1991; 27 years ago (1991 - 09 - 17)) </Td> </Tr> <Tr> <Th> Latest release </Th> <Td> 4.19 (22 October 2018; 7 days ago (2018 - 10 - 22)) (±) </Td> </Tr> <Tr> <Th> Latest preview </Th> <Td> 4.19 - rc8 (15 October 2018; 14 days ago (2018 - 10 - 15)) (±) </Td> </Tr> <Tr> <Th> Available in </Th> <Td> English </Td> </Tr> <Tr> <Th> Kernel type </Th> <Td> Monolithic </Td> </Tr> <Tr> <Th> License </Th> <Td> GNU General Public License, version 2 plus various optional freely redistributable (proprietary) binary blobs </Td> </Tr> <Tr> <Th> Official website </Th> <Td> kernel.org </Td> </Tr> </Table> <Tr> <Td_colspan="2"> Tux the penguin, mascot of Linux </Td> </Tr>

In what year was the source code for the linux kernel released