It is tempting to confuse pop music with popular music . The New Grove Dictionary Of Music and Musicians , the musicologist 's ultimate reference resource, identifies popular music as the music since industrialization in the 1800s that is most in line with the tastes and interests of the urban middle class. This would include an extremely wide range of music from vaudeville and minstrel shows to heavy metal . Pop music, on the other hand, has primarily come into usage to describe music that evolved out of the rock 'n roll revolution of the mid-1950s and continues in a definable path to today.
Competition between existing sellers: - The industry in which McDonalds is categorized is highly a competitive one, as it comprises of a number of fast food companies who can come up with new ideas over the night and take up with the business of their competitors. Therefore McDonalds have done a great job over the years since 1940 by bringing in new products, expansion of their business and remarkably going well with their customer's choice and preference to stay strong and do well in the industry working globally over 120 countries and having more than 32,000 restaurants worldwide.