Working Concepts

Working Concepts is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Human Factors & Ergonomics
• Safety Equipment & Clothing

North American Industry Classification System (NAICS) Categories:

• Other Clothing Stores > Uniforms, Work & Safety Clothing > Safety Clothing
• All Other Miscellaneous Store Retailers (Except Tobacco Stores) > Alarm & Safety Equipment > Safety Equipment & Supplies
• Research And Development In The Physical, Engineering, And Life Sciences > Biological Research > Human Factors Research & Development

Standard Industry Classification (SIC) Categories:

• Miscellaneous Apparel And Accessory Stores > Uniforms, Work & Safety Clothing > Safety Clothing
• Miscellaneous Retail Stores, Nec > Alarm & Safety Equipment > Safety Equipment & Supplies
• Commercial Physical & Biological Research > Biological Research > Human Factors Research & Development