Wikimedia
Wikipedia: Blackberry
This Wikipedia article gives an overview of the Blackberry (personal digital assistants). This wireless handheld device supports push e-mail, mobile telephone, text messaging, internet faxing, web browsing and other wireless information...
TexasHistory.com
Texas history.com: Big Bend Spotlight
The Big Bend, now a national park in Texas, was once home to a unique way of life, described briefly here. Before the telephone, there was no way for residents to communicate, except through the Mexican Grapevine using mirrors to flash...