Commercial - Commercial activities are the activities that require a capital. Some examples of this can be wholesale and retail trade, construction, transportation, communication, financial mediation, real estate and leasing.
Professional - Professional activities are the activities that depend on mental and physical effort. Examples include agriculture, fishing, education, health, social work and community, social and personal services.
Industrial - Industrial activities are the activities that require a capital. Examples include manufacturing, mining, quarrying, electricity, gas, and water.