Jipp curve is a term for a graph plotting the number (density) of telephones against wealth as measured by the Gross Domestic Product (GDP) per capita...

Cordless telephone Harvard sentences Index of telephone-related articles Jipp curve List of telephone operating companies Mobile operating system Multimedia...

history Hybrid routing Innocenzo Manzetti Invention of the telephone Jipp curve Local loop Mobile phone Philipp Reis Phreaking Plain old telephone service...