Tsr

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

• Cellular & Mobile Telephone Service
• Information Technology Services

North American Industry Classification System (NAICS) Categories:

• Wireless Telecommunications Carriers (Except Satellite) > Cellular & Mobile Phone Service Companies
• Data Processing, Hosting, And Related Services > Information Technology Services

Standard Industry Classification (SIC) Categories:

• Radiotelephone Communications > Cellular & Mobile Phone Service Companies
• Computer Processing & Data Preparation & Processing Services > Information Technology Services