To keep an airline functioning smoothly, most employers hire an assortment of administrative personnel. These positions include secretaries, mail clerks, data entry workers, receptionists, public relations specialists, and those who work in the human resources department who handle or oversee the hiring, training, and termination of employees. The duties of administrative personnel vary by position but often include answering telephones, routing telephone calls, transcribing executive correspondence, data entry, filing paperwork, backing up computer files, scheduling and organizing or coordinating meetings, ordering supplies, and making executive travel arrangements.