That's the one l struggle with has and as and l fecking know it's to do with "belonging to". Memory block at school l think.
They are initialisms not acronyms. In acronyms the initials make words, for example UNICEF or FIFA. Example of initialisms are BBC or NHS.
Text speak in general. I asked my brother once why he wrote a text message where almost every word was shortened or abbreviated, he said it was easier. IT'S NOT FECKING EASIER TO READ!!!
I see You're right, I'm not that clever. I went for Electroconvulsive Therapy, what with it driving him bonkers.