Hydra

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

• Electronic Instruments
• Research & Development Centers

North American Industry Classification System (NAICS) Categories:

• Radio, Television, And Other Electronics Stores > Electronic Equipment & Supplies > Electronic Instruments
• Research And Development In The Social Sciences And Humanities

Standard Industry Classification (SIC) Categories:

• Radio, Television, And Consumer Electronics Stores > Radio, Television & Electronic Stores, Nec > Electronic Instruments
• Commercial Economic, Sociological & Educational Research