Accounting and octets - a silly one!

Hi Guys, I just have a quick question, and I think I know the answer to this, but let's make sure. Generally speaking, is acct-input-octets / acct-output-octets referenced in bits, or bytes? Google reveals very conflicting information, whilst I personally would presume it would be NAS dependant (i.e. whether the NAS sends the accounting as bits or bytes)... What is it usually, and what does Cisco NASes generally represent? -- Regards, Chris Knipe