It all depends who you ask and what their perspective is.
be it professionally focused, or technically myopic
or be it broad minded or confidently illiterate.
It's like asking a professional architect of the internet to answer ; what does internet mean? He would most likely define it only in his layer of expertise.
The answer lies in 7 layers.
Whereas in abbreviations, the answer lies in an almost infinite number of modalities and one only need to communicate in abbreviations with those in the same.
See Electronic BABEL