What is the correct capitalization for bitcoin/Bitcoin?

[BitcoinOrigins]

I was wondering it seems the majority of users are using Bitcoin but I see a few people who are quite techy using bitcoin what is the correct way?

[Welsh]

Accepted practice is to use "Bitcoin"  to label the software, protocol, and community, and "bitcoins"  to label tokens/unit of currency. 

[Q7]

Not sure if I've heard about this before and whether capitalization makes any difference so I just use them interchangeably.

[MessyCoin]

I think "Bitcoin" refers to the software, whereas "bitcoin" refers to the currency. (Just like Welsh said above.)

[bg002h]

The Bitcoin software, network, and concept is called "Bitcoin" with a capitalized "B". Bitcoin currency units are called "bitcoins" with a lowercase "b" -- this is often abbreviated BTC.

Quoted from: https://bitcointalk.org/adrotate.php?adinfo

[BitcoinOrigins]

Thanks for the answers guys much appreciated!