Imagine this: My son is in his car seat, eating an afterschool snack. He's reading the packaging. Cool.
"Mom, this has 0 Gigabites Trans Fat."
I park the car and turn around to see what on earth he could be talking about. The snack package says, "0 G Trans Fat".
I was so proud of myself: "Honey, the abbreviation for gigabites is usually GB. On a food package, a little g by itself is a gram."
Jee laughed his sparky little laugh and we began a discussion about how the package should have had a lower-case g rather than an upper case one and how that was what confused him.