I take your point, Doug. But these are recognised, standard abbreviations, generally accepted for online discourse; so I don't think it unreasonable to expect the meaning to be known clearly to anyone using an online forum I would suggest that they are, once learnt, convenient communication-enhancers. All language is conventional, after all. As well object to the use of a word you might not know, rather than taking the obvious recourse of consulting a dictionary so that you will recognise it next time.

Thank you for affording me that 'typo' get-out!

LoL

~M~