Columbia subject headings:
Chemical industry--United States--Data processing.
Chemical process control--Data processing.
Chemicals--United States--Safety measures--Data processing.
Year 2000 date conversion (Computer systems)--United States.
Harvard subject headings:
Chemical industry--United States--Data processing.
Chemical process control--Data processing.
Chemicals--United States--Safety measures--Data processing.
Year 2000 date conversion (Computer systems)--United States
Princeton subject headings:
Chemical industry--United States--Data processing.
Chemical process control--Data processing.
Chemicals--United States--Safety measures--Data processing.
Year 2000 date conversion (Computer systems)--United States.