Engineering drawing drawing on A3 may be enlarged to A2 or reduced to A4. The U.S. customary "A-size" corresponds to "letter" size, and "B-size" corresponds to "ledger" or "tabloid" size. There were also once British paper sizes, which went by names rather than alphanumeric designations. American Society of Mechanical Engineers (ASME) ANSI/ASME Y14.1, Y14.2, Y14.3, and Y14.5 are commonly referenced standards in the U.S. Technical lettering is the process of forming letters, numerals, and other characters in technical drawing. It is used to describe, or provide detailed specifications for an object. With the goals of legibility and uniformity, styles are standardized and
American Letter Mail Company American Letter Mail Company The American Letter Mail Company was started by Lysander Spooner in 1844, competing with the presumed legal monopoly of the United States Post Office (USPO, now the USPS). Spooner started the service out of frustration with the exceedingly high postal rates. It cost 18 3/4 cents to send a letter from Boston to New York and 25 cents to send one all the way to Washington DC. A letter sent from Boston to Albany, NY written on a 1/4-ounce sheet of paper and carried by the Western Railroad, cost 2/3 as much as the freight charge