Updated: 01/18/2023 by Computer Hope

An E- may refer to any of the following:

1. E- is a prefix describing anything electronic, that is, any data or information transmitted over a network or the Internet. For example, e-mail is a word (compound noun) 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 known as an "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 use a hyphen. However, many people and style guides prefer 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 and be consistent.

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

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

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

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