# One

**One** may refer to any of the following:

1. **One** is a numerical value represented as "1" that's the first positive number following the zero. On a computer keyboard with a numeric keypad, there are two 1's. One on the top row of numbers and the other 1 on the keypad.

## What symbol is on the 1 key?

On U.S. keyboards, the 1 key is on the same key has the exclamation mark (!).

## Other computer terms with "one" in them

The following list is other computer-related terms with the word "one" in them.

- OneDrive
- One-D-Ten-T
- One laptop per child
- One-line text box
- One million bytes per second
- OneNote
- One-pass compiler
- OnePlus
- One-step backup
- One-time password
- One-time programmable
- One-to-many routing
- One-to-one routing
- One Tree Software

For computer terms that start with the number 1, see our computer number terms.

2. In binary, **1** equals **On**.

In ASCII (American Standard Code for Information Interchange), the numerical value of "1" is "049" in decimal (00110001 in binary). To count to "1" in binary, it would be 00000001.

3. The number **1** is also with the `Alt`+`1`, `Command`+`1`, `Ctrl`+`1`, and `Shift`+`1` keyboard shortcuts.

4. On the keyboard LEDs, a square with the number "1" indicates the Num Lock on some keyboards.

5. The number **1** is used as chat slang to say "one" or "won." For example, someone could shorten "someone" into "some1."

6. With leetspeak, the number **1** is used in place of the letter "l" (L) in text.

7. As a Roman Numeral, "I" is 1.