i can see we aren't going to come to any agreement on this matter, but hey what use would a rant section be if anyone agreed
your English is pathetic as shown in examples within this single page, i would suggest that is a symptom of poor educational base.
some will agree, some wont.
To pick only one example because i have quoted it and it's glaringly obvious, you say 'txt' before imparting it the title 'abbreviation' (in your words 'its basic abbreviation')
'txt' is many things, a common file extension, acronym, even a film title, what it is not is an abbreviation.
Finally regarding your definition of what is or is not known worldwide, i can safely assume that your conclusion is rather weak. Must everyone know the answer before something is known worldwide? i think not.
Phil