Invisible Ink

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

• Advertising Agencies & Counselors
• Information Search & Retrieval Service

North American Industry Classification System (NAICS) Categories:

• Computer Systems Design Services > Information Management
• Advertising Agencies > Advertising Services > Advertising Consultants

Standard Industry Classification (SIC) Categories:

• Advertising Agencies
• Information Retrieval Services