IMac Early 2009 10.7.5-Terminal Open When Logging On

For the past logins, the Terminal icon is open. When I click on it, it says this:
Last login: Sat Jan 26 15:17:15 on ttys000
As-iMac:~ ronimac3$
What does this mean?

Your welcome! 
Thank you for saying so.
Sometimes I think that the more experienced power user's get a little annoyed with me, but I don't care because the main point here is to help everyone.

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