The lexicon of the top500 ( The Encyclopedia for Classification Codes ) explains the codes and definitions in the world of economical classifications.
ISIC Code 201 Sawmilling and planing of wood
The ISIC Code 201 is described as
Sawmilling and planing of wood
It belongs to the code group
ISIC Code 20 Manufacture of wood and of products of wood and cork, except furniture; manufacture of articles of straw and plaiting materials