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Browsing results matching Telephone switching systems, Electronic.

	Subject	Items
1.	Telephone switching systems, Electronic.	1
2.	Telephone systems	2
3.	See Also Cell phone systems	2
4.	See Also Digital telephone systems	3
5.	See Also Internet telephony	3
6.	Telephone systems -- Data processing -- Encyclopedias.	1
7.	Telephone systems -- Design and construction.	1
8.	Telephone systems -- Hawaii -- Hilo -- Planning.	1
9.	Telephone systems -- Periodicals.	1
10.	Telephone systems -- Security measures -- History.	1
11.	Telephone systems -- United States -- Patents.	1
12.	Telephone -- Technological innovations.	1
13.	Telephone -- Technological innovations -- United States.	1