Hi Max,

There are many, many of these. Some of the most common ones in addition to IMO and TIA are: IMHO (in my humble opinion), AFAIC (as far as I'm concerned), AFAIK (as far as I know), YMMV (your mileage may vary, which means "you may get different results"), BTW (by the way), and OIC ("Oh, I see"). You can find a lot of places on the Web that provide lists of these so-called three-letter acronyms (or TLA's < s >). Go to http://www.google.com/search?hl=en&q=three-letter+acronyms for some references. BTW, < s > means "smile" and < g > means "grin".

-Rick

>My English level is not good .
>
>
>I guess, IMO=in my opinion, TIA=think in advance (?)
>
>Could anybody tell the more usaful abrev. ?
>
>
>TIA
>
>max.