[lolcat missing]
“At” is directive, often location-based and related to where we are in the moment. There’s also an intention to action; “at” leads us, points us somewhere, toward a means to an end. We see this in phrases like “at the plate” and even “at the rate of.”
The symbol for "at"* is also manifest in online communicative technologies. In email, @ is part of an intended location; on Twitter, @ is synonymous with “mention” and “reply.”
As part of a sentence or an online address, @ is a leader to what comes next, to where we want to go. @ implies motion in meaning; @ implies progression. @ is both present and future. @ is where we are and where we want to or will be.
*To my knowledge, the symbol for “at” has no other grand name, nothing so important as ampersand. However, it is known by a range of informal terms in languages other than English. Most of these relate to what @ looks like, including miukumauku (Finnish for “meow meow”), klammeraffe (German for “hanging monkey”) and sobachka (Russian for “little dog”).