Parentheses in domain mean exclude, square brackets mean including If you have infinity or negative infinity, the corresponding sign needs to be parentheses. A number from 1 to infinity not including 1 would be written as (1, *insert infinity*) Including 1 [1, *insert infinity*)
Intro - History & Timeline. Verizon Communications was created on June 30, 2000 by Bell Atlantic Corp. and GTE Corp., in one of the largest mergers in U.S. business history. GTE and Bell Atlantic evolved and grew through decades of mergers, acquisitions and divestitures.
The first cellular phone was invented and demonstrated in 1973 by Martin Cooper, an engineer and general manager for Motorola, who successfully developed a portable handset using cellular communications technology. Cooper made the first ever cellular phone call in April 1973 using the prototype Motorola Dyna-Tac.However, Cooper's first cellphone was the result of decades of research and development into mobile radio communications, and cellphones would not be widely used until 20 years after the Dyna-Tac.ooper made the first ever cellular phone call in April 1973 using the prototype Motorola Dyna-Tac. However, Cooper's first cellphone was the result of decades of research and development into mobile radio communications, and cellphones would not be widely used until 20 years after the Dyna-Tac.