Staffing of work that is administrative in nature, takes place in an office setting, and/or consists primarily of customer service or sales (except waiters and waitresses). Common job titles include office clerk, cashier, customer service representative, administrative assistant, receptionist, data entry specialist and telemarketer. Roughly corresponds to the US Bureau of Labor Statistics’ (BLS) Office and Administrative Support Occupations and Sales and Related Occupations groups. Also roughly corresponds to the European Union’s International Standard Classification of Occupations’ (ISCO) Clerical Support Workers and Service and Sales Workers groups.