Updated: 12/31/2022 by Computer Hope

E may refer to any of the following:

Large blue letter E.

1. Short for Enlightenment, E is a desktop windows manager for X Windows, first developed by Carsten Haitzler in 1997. Enlightenment can run by itself or 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 keyboard key used with the keyboard shortcuts Alt+E, Command+E, and Ctrl+E.

4. E is an abbreviation of an 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 Adobe Photoshop, E is a shortcut to select the eraser tools. Holding down the Shift while pressing E cycles through all erasers.

9. E is the SI-derived symbol of exa.

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

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

12. 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 Shift and E at the same time.

With U.S. QWERTY keyboards, the "E" key is on the top row, right of the "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 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).


Doing the Alt code Alt+69 creates a capital "E" and Alt+101 creates a lowercase "e" character.


The number 3 on a phone keypad is used to create an "E" on a US phone.

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