Well-known Testing Systems
1. NCC
England
2. NIST(National Institute
of Standard & Technology)
Maryland, U.S.A.
3. Univ. of British Columbia
Canada
4. Chamelon
California, U.S.A.
5. IDACOM
Canada
6. AT&T
New Jersey, U.S.A.
7. CNET
France
8. Siemens
Germany
9. Bell Northern
Canada
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