e-mail — correspondence sent electronically
e-mail addresses — lowercase, with hyphen
e-business or e-commerce — lowercase, with hyphen
Internet — proper noun, capitalize
home page — two words
online — one word
PC — personal computer
URL — All caps; acronym for Uniform Resource Locator, which is the term for World Wide Web addresses.
URLs — World Wide Web addresses should be lowercase, with no spaces between the characters. At present, include the “http://” or other server designation at the beginning of the URL. Not all WWW browsers automatically insert this information, and not all WWW servers are http servers.
Web — proper noun, capitalize
website — one word, lowercase