Acceptable in all references for electronic mail. Many email or Internet addresses use symbols such as the at symbol (@), or the tilde (~) that cannot be transmitted correctly by some computers. When needed, spell them out and provide an explanatory editor’s note. Use a hyphen with other e- terms: e-book, e-business, e-commerce.
Indian city formerly known as Calcutta.
An advanced cellphone that allows for email, Web browsing and downloadable applications.