Visit the help section on the website, located on the top right hand corner.
Here is a good history of twitter: http://profilerehab.com/twitter-help/history_of_twitter
A Twitter handle is your username and the accompanying url. See the related link for a glossary of terms in the Twitter Help Center.
with the help of their hands...
Find a bird to help you
Follow the related link below to the Twitter Help Center which explains how to report violations.
Click on the Sports section of this Directory of Celebrity twitter accounts and you will see a bunch of pro-athletes listed:http://profilerehab.com/twitter-help/celebrity_twitter_list
To find a how to guide on twitter for business, you can go onto the Twitter website. They have a help section that will give you pointers for how to navigate their website for your marketing purposes.
Follow the related link for a detailed page on what Twitter considers as spam from their official Help Center.
Most of the Twitter apps are a play on the word "Twitter". You should try to do the same as it makes it clear it's an app for Twitter. Something simple will draw more people towards it.
Docstoc - 2011 How Twitter Can Help Your Business Development - 5.5 was released on: USA: 10 October 2013
Follow the related link to the Twitter Help Center Android FAQ which explains the signing out process.
Follow the related link below to the Twitter Help Center which gives various reasons as to why Twitter accounts are suspended. You can contact Support from there to find out why you were suspended.