MonsterTRAK, a college-specific division of Maynard-Mass.-based Monster Worldwide, today announced the top five industries for entry-level employment, based on the number of job opportunities posted to the site. The top five occupations are: Business operations, HR and financial services, posting nearly one fourth of all opportunities for entry-level workers; sales and marketing, the most rapidly growing segment; architecture and engineering, particularly naval architects and marine engineers; computer, IT and mathematical, which grew 18 percent over last year; and office, administrative and customer support.