An MBA is a Masters of Business Administration which is a Masters Degree which is graduate school. Undergraduate is a Bachelors Degree (4 years of college) or an Associates Degree (2 years of college). Some schools have Masters Degree programs that are like 4+1 (5 years) that are a bit accelerated.
In 1847, the United States Post Office Department printed its first stamps, a 5-cent stamp picturing Benjamin Franklin and a 10-cent stamp picturing George Washington.
Postage Stamps. A schoolmaster from England, Rowland Hill, invented the adhesive postage stamp in 1837, an act for which he was knighted. Through his efforts, the first postage stamp system in the world was issued in England in 1840. Hill created the first uniform postage rates that were based on weight, rather than size. Hill's stamps made the prepayment of postage both possible and practical. History of The United States Postal Office