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My damn computer keeps locking up and spontaneously rebooting. This is not a good sign.
As Paul said, the most basic junction transistor design consists of three tiny layers of a solid silicon or germanium based compound stuck together. These layers are made in such a way that they are more or less heavily "doped", i.e. have more or less of a surplus of free electrons, so that a particular layer will want to either emit or collect those free electrons. The less heavily doped layer is also described as having "holes", or places for the electons to go to. The "emitter" layer and the "collector" layer are sandwiched around the "base" layer which is in the middle.
The base layer is biased in the circuit to control the flow of electrons between the emitter and collector.
Hope that helps!
Clay
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