Topic Page: EmploymentEMPLOYMENT CAN BE categorized in many ways: blue-collar versus white-collar, full-time versus part-time, year-round versus seasonal, permanent versus migrant, skilled versus semiskilled or unskilled, unionized versus nonunionized, experienced versus apprentice. Classifications by type of work can be reduced to four basic categories: professional, service, industrial, and agricultural. (Jobs related to transportation and communications might be placed in each of the four categories, while those related to mining, logging, and the exploitation of other natural resources might be categorized as either industrial or agricultural. Government employment would fall largely under service.)