The almighty ampersand linking R and D

According to Wikipedia, the lowly ampersand or “&” is a logogram representing the conjunction word “and” using “a ligature of the letters in et,” which is of course the Latin word for “and.”

In my line of work I most frequently encounter the ampersand in the common phrase “R&D” for research and development, although I notice that with texting and short-form social media the ampersand is making something of a comeback in frequency of use anyway.