Your responses have to be under 140 characters. If you don’t understand the acronyms, www.urbandictionary.com is a huge resource for all modern permutations, although keep your blinders on- it tends to be NSFW in parts.

You sign up at twitter.com. For company use, you probably want to find a name that can be used across all platforms, so if you decide to build a facebook page or expand your presence, you can consistently use a name. To search to see if the name that you like is actually being used anywhere else, try http://knowem.com/. I run my name through every now and then for the fun of it to make sure that someone else isn’t using it on other sites that I don’t frequent.

Sign-up is simple:

Twitter Sign in Screen