The unit of account of the bitcoin system is bitcoin. As of 2014, symbols used to represent bitcoin are BTC,[note 1] XBT,[note 2] and BitcoinSign.svg.:2 Small amounts of bitcoin used as alternative units are millibitcoin (mBTC), microbitcoin (µBTC, sometimes referred to as a bit), and satoshi. Named in homage to bitcoin's creator, a satoshi is the smallest amount within bitcoin representing 0.00000001 bitcoin, one hundred millionth of a bitcoin.
A millibitcoin equals to 0.001 bitcoin, one thousandth of bitcoin.
One microbitcoin equals to 0.000001 bitcoin, one millionth of a bitcoin.
A proposal was submitted to the Unicode Consortium in October 2015 to add a codepoint for the symbol.
As of November 2016, it is in the pipeline for position 20BF (₿) in the Currency Symbols block.
