After brewing a beer with a commercial brewer, everything is done in plato. When the brewer converts the lingo to a homebrewer, he has to calculate that into gravity. A brewer friend asked, "Why don't we use gravity?". Why don't we homebrewer's use plato for our measurements instead of gravity?
"The mouth of a perfectly happy man is filled with beer."
- Egyptian Proverb
The Keg Ran Out Club (KROC)