Acronym standardisation

We need to settle on a standard method of formatting acronym 
translations e.g GNU => GNU Not Unix, different people favour different  
ways of formatting them, I prefer italicising each initial letter:
/G/NU /N/ot /U/nix
others put the whole thing in bold italicising the initials (this is 
unreadable on my browser)
*/G/NU **/N/ot/ /**/U/nix*
and other embolden the initial letters.
*G*NU* N*ot *U*nix

So which is it to be??? I personally favour italicised initials.
--tom.c