How do I retrieve deleted applications on my TI-89 calculator?

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Trinecea
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My problem is that I don't understand how to really work my TI-89. Today I wanted to make more space so it wouldn't work so slowly, but I deleted majority of my applications without meaning to. I don't know how to get these applications back either, please help!
 

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You are screwed man. Once you delete something on TI89 it is game over. I hade the same and by deleting files you will not speed it up , anyhow that is over now. sorry.
 
Thanx i guess but i just figured it out today my friend transferred his applications to my calc.
 

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