Set Up Text Substitution in Mac OS X
Using Text Substitution, you can easily write any special character or symbol like ™ or ® just by typing something like TM or (r). You can adjust this and set your own, and it’s easy to configure:
* Go to the Apple menu and down to “System Preferences”
* Click the “Language & Text” preference pane
* Click on the “Text” tab
* Adjust text to replace with a symbol or other text, add more text to replace by hitting the + button
For example, I set “OXD” to be replaced with “OS X Daily”, so anytime I type OXD and hit space the text will be replaced.

Now here comes the interesting part, the Text Substitution feature is not enabled by default in many Mac OS X applications and it has to be manually enabled on a per application basis. This is easy enough, but oddly Apple has named it something different once inside the application, it’s called “Text Replacement”, and here’s how to enable it:
* In most cocoa applications, open the “Edit” menu and scroll down to “Substitutions”
* Select “Text Replacement” and a check will appear next to it in the submenu, signifying text replacement is enabled for that application
* Now just type a shortcut that you had set earlier and your text will be replaced with the substitution set within the System Preferences
Text substitution / replacement is a really helpful feature, and I hope Apple allows you to enable it across all applications in future versions of Mac OS X with a simple ‘Enable for all applications’ switch within the Language & Text system prefs.

You can enable them globally, just enter this into Terminal (/Applications/Utilities)
defaults write -g WebAutomaticTextReplacementEnabled -bool true
Oh, one more thing, this only works in Snow Leopard.
Arf. I am using texpander for those exact features.
Texpander allows you to paste pictures and formatted texts. But I never use those features.
Its a problem in big parts of Europe with 1/2, 1/3 etc it means February 1 and March 1 to
Apparently this capability exists in the newer version of OS X because my 10.5.8 does not have this, at least I could not find it. If it is in 10.5.8, can anyone tell me how to find it?
Doesn’t seem to work in MS Office apps
Followup: in MS Word, use Tools/Auto Correct to enable identical functionality.
Mr. Man, your solution doesn’t work for me (I’m with Snow Leopard)
Is there any way to import the 100s of shortcuts i have in a text file?