#char[140] – 140 characters to write a useful bit of code

My thought for today is:

What is the most useful piece of code you can write in 140 characters?

Inspired by Twitter, which started me thinking back to when using less code was better. In these days of software bloat and descriptive languages it is easy to forget what we use to be able to achieve in very few lines of code. So if anyone is listening, what are your thoughts or examples of useful code in 140 characters.

#char[140] Guidelines

1. Any language allowed
2. Can call external applications and APIs but external call should not replace core logic on the 140 character program
3. Must do something useful, Hello World although useful as a learning tool is not in the spirit of this challenge

I will try to think of something and post an example.

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