When did GM first introduce the COPO option ?

[Mr70]

Originally Posted by Burd

COPO stands for Central Office Production Order &

Is that a typo, or what does the amp mean.

It's not a typo.
"Amp" is short for Ampersand,which is what this symbol is.. &. It's how they software recognized it and copied it as such back then.
I've learned to use the word "and" instead,shortly after I typed that after many Bulletin Board sites in the early years of the internet were coding it how you referenced it.
I've noticed nearly all the BB sites have upgraded since then to recognize it as written today.