business; professional work; service; CL:項|项[xiang4]

in one's spare time; outside working hours; amateur (historian etc)

owner; proprietor

achievement; accomplishment; (in more recent usage) performance (of a business, employee etc); results

industry

undertaking; project; activity; (charitable, political or revolutionary) cause; publicly funded institution, enterprise or foundation; career; occupation; CL:個|个[ge4]

specialty; specialized field; main field of study (at university); major; CL:門|门[men2],個|个[ge4]; professional

graduation; to graduate; to finish school

occupation; profession; vocation; professional

company; firm; enterprise; corporation; CL:家[jia1]