#isicWW hashtags are systematically defined for each economic activity as classified in ISIC, the International Standard Industrial Classification of All Economic Activities, Rev.4.

There are hashtags at four levels, for industry sections, divisions, groups and classes.

Check the corresponding tab for ISIC sector class maps and numbers under the listed ISIC sections:

A - Agriculture, forestry and fishing
B - Mining and quarrying
C - Manufacturing
D - Electricity, gas, steam and air conditioning supply
E - Water supply; sewerage, waste management and remediation activities
F - Construction
G - Wholesale and retail trade; repair of motor vehicles and motorcycles
H - Transportation and storage
I - Accommodation and food service activities
J - Information and communication
K - Financial and insurance activities
L - Real estate activities
M - Professional, scientific and technical activities
N - Administrative and support service activities
O - Public administration and defence; compulsory social security
P - Education
Q - Human health and social work activities
R - Arts, entertainment and recreation
S - Other service activities
T - Activities of households
U - Activities of extraterritorial organizations and bodies

An industry section hashtag has the structure #ww88A, with the last character the alphabetic section code A, B, C, … until U.

In country specific industry section hashtags the ww is replaced by the two character ISO code of the country as illustrated in #TZ88A.