Updated: 08/16/2021 by Computer Hope

E may refer to any of the following:


1. Short for Enlightenment, E is a desktop windows manager for X Windows, first developed by Carsten Haitzler in 1997. Enlightenment is capable of running by itself or in conjunction with other desktop environments, such as GNOME and KDE.

2. E with a hyphen is an abbreviation for "electronic." For example, e-mail is short for electronic mail. See our E- page for further information and examples.

3. E is a key used with the keyboard shortcuts Alt+E, Command+E, and Ctrl+E.

4. E is an abbreviation of exponent.

5. With the ESRB (Entertainment Software Rating Board), an "E" rating is short for "everyone" and is a game meant for players of all ages.

6. With a regular expression, \e matches an escape.

7. With Microsoft Excel and other spreadsheet programs, "E" is the fifth column of a spreadsheet. To reference the first cell in the column, you'd use "E1."

8. In the phonetic alphabet, "E" is often pronounced as "echo."

9. Euler's number (e) is a mathematical irrational number that's approximately equal to 2.71828 and is helpful in finding slopes in Calculus and working with compound interest. When working with a scientific calculator, this number can be entered by pressing the "e" button.

10. E is the fifth letter of the English alphabet. The letter "E" comes after "D" and is followed by the letter "F." To create a capitalized "E" press the Shift and E key at the same time.

With U.S. QWERTY keyboards, the "E" key is on the top row, to the right of "W" and left of the "R" key. See our keyboard page for a visual example of all keyboard keys.


If the "E" key is not working on the keyboard, see: Some of the keys on my computer keyboard aren't working.


In ASCII the uppercase "E" is "069" in decimal (01000101 in binary). The lowercase "e" is "101" in decimal (01100101 in binary).

Computer abbreviations, GNOME, KDE, Letter, Operating system terms