Updated: 11/06/2021 by Computer Hope

An E- may refer to any of the following:

1. E- is a prefix used to describe anything electronic, that is any data or information transmitted over a network or the Internet. For example, e-mail is a word using this prefix to describe "electronic mail," which is mail sent and received over the Internet.

Examples of words using the "e-" prefix


These words are sometimes referred to as a "e-word."


See our full list of computer-related terms containing e- using our word and letter search.

Is the hyphen required in all "e" prefixed words?

When describing any of the above words, or any other compound noun, we always choose to use a hyphen. However, many people and style guides prefer the non-hyphenated version of words like "email" instead of "e-mail." Follow the rules of your style guide or if you have no style guide choose one form or the other and be consistent.

Should I capitalize the "e-" prefix when using it in my writing?

Unless the word beginning with the "e-" is at the beginning of a sentence it should be lowercase.

2. Electronics can also refer to all the components that make up electronic devices. See our electronics terms for a full listing of electronic terms and components.

Computer slang, Cyber, E, E Ink, Elationship, Internet terms, Mechanical, Prefix