I need help with turtles.

Hey I was wanting to know how can I make a turtle select a slot in a chest?
I wanted to make a turtle storage system but I wanted different items in a different slot of the chest so the turtle could easily find them.
I know how to get and drop items to a chest but how do I select a slot in that chest to drop or place items specifically in a chest slot.

As of yet, I don't think you can. A good example of a turtle sorting system I saw was the "Turtle Butler" program, which is on ComputerCraft's official site, or youtube, maybe you can get an idea from that? Hopefully this limitation will eventually be fixed in a future update.