All four firms are adapting to diminished traffic in letters and important documents because of e-mail, and the growing demand for parcel delivery to end-consumers generated by e-commerce sites such as Amazon.

ECONOMIST: Global express-package companies

Far better for the criminal, said Paul King, senior security advisor for Cisco, is to use those phishing e-mails to exploit the end user.

BBC: RELATED BBC SITES

Though it can be used as a phone, the BlackBerry's power lies in its ability to push e-mail automatically from the company server to the end user.

CNN: How BlackBerry conquered the world