There is western red cedar roofing, there is white cedar roofing, there is Alaskan yellow cypress roofing which is also referred to as Alaskan yellow cedar roofing. Alaskan yellow cypress roofing, the best by far, is more expensive than the red cedar and the white cedar.
Summing up: 1  An abbreviation is a shortening of a word or a phrase. 2  An acronym is an abbreviation that forms a word. 3  An initialism is an abbreviation that uses the first letter of each word in the phrase (thus, some but not all initialisms are acronyms).
Every acronym is an abbreviation because the acronym is a shortened form of a word or phrase. However, not every abbreviation is an acronym, since some abbreviations - those made from words - are not new words formed from the first few letters of a series of words. An abbreviation is a shortened form of a word or phrase, as N.Y. for New York, Mr. for Mister, lb for pound or ctn for carton. There are millions of common abbreviations used every day. When you write out your address, most people write St. or Ave. instead of street or avenue..