The trademark symbol , designated by ™ (the letters TM written in superscript style), is a symbol used to provide notice that the preceding mark is a trademark . Use of this symbol does not mean that the trademark has been registered as registered trademarks are indicated using the Registered trademark symbol (®).
The character is mapped in Unicode under position U+2122,[ 1] which is also designated by the HTML entity ™.[ 2] On Windows systems, a superscript trademark symbol may be entered by means of Alt codes , by holding the Alt key while typing the numbers 0153 on the numeric keypad . In the X Window System , it may be entered with <Multi_key > . On Macintosh systems, it may be entered with ⌥ 2. In LaTeX ,
\texttrademark is used.
The service mark symbol ,℠, has a similar function and denotation.