Bell Laboratories Building - Manhattan - was created in 1898.
yes
Bell laboratories
BELL Laboratories
The engineers at Bell laboratories
Dennis Ritchie at Bell Laboratories in 1972.
Dennis Ritchie at AT&T Bell Laboratories.
Bell Laboratories
PSTN
C was developed by Dennis Ritchie at AT &T's Bell Laboratories of USA in 1972.
Most are done in hospitals, clinics, or laboratories.
It was the Transistor!