P T D I

P T D I is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Design Services
• Drafting Services

North American Industry Classification System (NAICS) Categories:

• Architectural Services > Architectural Support Services > Architectural Designers
• Drafting Services

Standard Industry Classification (SIC) Categories:

• Business Services, Nec > Drafting & Mapping Services > Drafting Services
• Architectural Services > Architectural Support Services > Architectural Designers