The timeline has all of the tweets from people that you follow in the order that they were tweeted. The most recent tweets are at the top.
It means timeline.
You can upload pictures to your timeline using TwitPic.
It is normal to not see your tweet on the Twitter timeline because sometimes it takes several minutes for it to show up.
There is no way of blocking Twitcam comments that appear on your Twitter timeline. The only way to stop Twitcam comments would be to unfollow or block the person tweeting the comments.
Keep scrolling down your timeline. Your older tweets will start to load.
Someone that you are following would have "retweeted" the tweet.
You can't unless they are tweeting and their tweets show up on your timeline .
You are 'listed' when another user creates a list, or personal timeline, and adds you to it.
When you follow someone on Twitter, their tweets will then appear on your "timeline". This means that you don't have to go to someone's individual profile to look at their tweets.
If they are not following you it will not appear in their timeline. It will always appear in their @replies though.
It should show up automatically when you have uploaded it as your display picture.
No this is not possible. Your search results are not posted on your timeline. They are private to you and nobody will know what you are searching.