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Private company

National Software Testing Laboratories

Company based in Pennsylvania founded in 19831

National Software Testing Laboratories (NSTL) was established by serial entrepreneur Joseph Segel in 1983 to test computer software. The company provides certification (such as WHQL and Microsoft Windows Mobile certification), quality assurance, and benchmarking services. NSTL was acquired by Intertek in 2007.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

1983Founded1

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National Software Testing Laboratories (NSTL) was established by serial entrepreneur Joseph Segel in 1983 to test computer software. The company provides certification (such as WHQL and Microsoft Windows Mobile certification), quality assurance, and benchmarking services. NSTL was acquired by Intertek in 2007.2

Corporate structure

National Software Testing Laboratories is part of a group headed by Intertek. 8 entities, 4 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

  • Intertek London, United Kingdom
    • National Software Testing Laboratories Pennsylvania
    • Intertek (Canada) Subsidiary
    • Intertek (United States) Subsidiary · United States
    • INTERTEK FINANCE PLC Subsidiary · London, United Kingdom
    • INTERTEK HEALTH SCIENCES INC. Subsidiary · Mississauga, Ontario, Canada
    • INTERTEK INDIA PRIVATE LIMITED Subsidiary · New Delhi, India
    • MOODY INTERNATIONAL (INDIA) PRIVATE LIMITED Subsidiary · Delhi, India

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); subsidiaries, stakes and holdings from Wikidata (CC0). Each entity in the chart links to its source.

Subsidiaries and ownership

Parent company

From Wikidata.1

Timeline

  1. 1983Founded Founded1

Sources

The numbers on this page point here. Each one links to the record it came from.

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  2. 2