9

I'm still unsure when to use Bitcoin and when bitcoin is more appropriate. Did anyone define when to use the word Bitcoin with a capital B? Is one used to talk about the currency as in "3 Bitcoin" and the other for the "bitcoin protocol"?

7

From Introduction on the Bitcoin wiki:

Capitalization / Nomenclature

Since Bitcoin is both a currency and a protocol, capitalization can be confusing. Accepted practice is to use Bitcoin (singular with an upper case letter B) to label the protocol, software, and community, and bitcoins (with a lower case b) to label units of the currency.

So, the accepted usage in your example would be "3 bitcoin" and the "Bitcoin protocol".

  • So "add the bitcoin amount" with small b is correct as we talk about the units of the currency? Thanks. – Cimm Mar 25 '14 at 8:54
  • @Greg, So would we say "I have a bitcoin address" or "I have a Bitcoin address"? – Pacerier Jun 2 '14 at 9:20
  • @Pacerier: According to the above, that would be "Bitcoin address". – Greg Hewgill Jun 2 '14 at 16:09
4

Bitcoin (capital B) is the name of a currency, a technology, and a movement. A bitcoin (small b) is a unit of this currency.

Example: "After hearing about Bitcoin, I've installed a Bitcoin client and bought 3 bitcoins."

Not the answer you're looking for? Browse other questions tagged or ask your own question.