Ampersand

The ampersand or &  is a curious thing in our language that dates back to the 1st century A.D.

Originally, it was a ligature of the letters E and T. What's a ligature? In writing and typography, a ligature occurs where two or more graphemes are joined as a single glyph. Ligatures usually replace consecutive characters sharing common components.

Suffice it to say, the ampersand is the most common one we use in English.

"Et" is Latin for "and" - as in et cetera - which is such a mouthful that we feel the need to shorten it to etc. It can actually be further shortened as &c. We are no language lazy.

I suppose if you look closely at the modern ampersand, you might still see the E and T hiding in there depending on the font. 

It is so commonly used that it is now considered more of a logogram than a ligature.

Is it a letter? No.

The dollar sign $ is another possible ligature/logogram. One theory is that it came from a ligature used for "pesos" and the Spanish peseta, but that's confiremed.

The word ampersand itself is a conflation of the phrase "and per se and." I have seen that explained as meaning "and [the symbol which] by itself [is] and" which makes no sense to me. 

The ampersand is something I have never been able to make with a pen. Mine always looked like little pretzels. Start at the bottom right corner, make a line up and to the left or reverse a 3 with a dash through it, from top to bottom twice. 

I just hit Shift-7. 

All this pondering on ampersands came from a curious little book by a wonderfully odd author, Craig Conley, which is logically titled Ampersand.