What are the main tasks of an office worker? Specific!

This work is not fixed, each company is not quite the same, but generally on these: 1, responsible for office hygiene and cleanliness 2, responsible for the various departments of the signing, distribution and management of various materials 3, responsible for the management of office files 4, responsible for the office of the daily guests reception 5, responsible for departmental printing, fax sending and receiving 6, responsible for the departmental equipment, management, as well as departmental office supplies 7, to complete the leadership of the temporary affairs