TI83/TI83 plus - How To's

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Q? My calculator is messed up! It won't work!
Q? How do I plot a function?
Q? How do I plot more than one function?
Q? How do I use the cursor keys to find coordinates on a graph?

Q? How do I plot a histogram?
Q? How do I calculate the least squares fit to data?
Q? How do I calculute the mean and standard deviation of a set of numbers?
Q? How do I find the solution of a system of linear equations using matrices?
Q? How do I find the area between two points on the normal distribution, P(A<Z<B)?
Q? How do I use the TI83 to solve compound interest and annuity problems?