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.
Of course Hill's proposal was heavily debated for a few years, but after serious discussion the change was enacted and instituted in 1840. Thus on May 6, 1840 (first date of valid use) the first government-printed postage stamps were born. Sir Rowland Hill himself designed the first stamp which cost one penny and bore the profile of Queen Victoria. Because the stamp was printed in black, the 1-cent stamp soon became known as the Penny Black -- the world's most popular stamp. These first stamps were imperforate, meaning that people had to cut apart the sheets of stamps.