<P> Electronics store still carry, as of 2014, non-CPU / non-MCU 4 - bit chips, such as counters . </P> <P> As of 2015, most PC motherboards, especially laptop motherboards, use a 4 - bit LPC bus (introduced in 1998) to connect the southbridge to the motherboard firmware flash ROM (UEFI or BIOS) and the Super I / O chip . </P> <P> With four bits, it is possible to create 16 different values . All single digit hexadecimal numbers can be written with four bits . Binary - coded decimal is a digital encoding method for numbers using decimal notation, with each decimal digit represented by four bits . </P> <Table> <Tr> <Th> Binary </Th> <Th> Octal </Th> <Th> Decimal </Th> <Th> Hexadecimal </Th> </Tr> <Tr> <Td> 0000 </Td> <Td> 0 </Td> <Td> 0 </Td> <Td> 0 </Td> </Tr> <Tr> <Td> 0001 </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> 0010 </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> 0011 </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> 0100 </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> 0101 </Td> <Td> 5 </Td> <Td> 5 </Td> <Td> 5 </Td> </Tr> <Tr> <Td> 0110 </Td> <Td> 6 </Td> <Td> 6 </Td> <Td> 6 </Td> </Tr> <Tr> <Td> 0111 </Td> <Td> 7 </Td> <Td> 7 </Td> <Td> 7 </Td> </Tr> <Tr> <Td> 1000 </Td> <Td> 10 </Td> <Td> 8 </Td> <Td> 8 </Td> </Tr> <Tr> <Td> 1001 </Td> <Td> 11 </Td> <Td> 9 </Td> <Td> 9 </Td> </Tr> <Tr> <Td> 1010 </Td> <Td> 12 </Td> <Td> 10 </Td> <Td> </Td> </Tr> <Tr> <Td> 1011 </Td> <Td> 13 </Td> <Td> 11 </Td> <Td> </Td> </Tr> <Tr> <Td> 1100 </Td> <Td> 14 </Td> <Td> 12 </Td> <Td> </Td> </Tr> <Tr> <Td> 1101 </Td> <Td> 15 </Td> <Td> 13 </Td> <Td> </Td> </Tr> <Tr> <Td> 1110 </Td> <Td> 16 </Td> <Td> 14 </Td> <Td> </Td> </Tr> <Tr> <Td> 1111 </Td> <Td> 17 </Td> <Td> 15 </Td> <Td> </Td> </Tr> </Table>

How many binary numbers can be created by no more than 4 digits