The lexicon of the top500 ( The Encyclopedia for Classification Codes ) explains the codes and definitions in the world of economical classifications.
NAICS Code 3344 Semiconductor and Other Electronic Component Manufacturing
The NAICS Code 3344 is described as
Semiconductor and Other Electronic Component Manufacturing It belongs to the code group
NAICS Code 334 Computer and Electronic Product Manufacturing
To this Code "3344" belongs the sub codes
NAICS Code 33441: Semiconductor and Other Electronic Component Manufacturing