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Practical Electronics/Perfboard
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There are many types of prototyping boards.
The vast majority of such boards are perforated at 0.1 inch (2.54mm) pitch (one hole each 0.1 inch/2.54mm) both horizontally and vertically (also called "tenth inch spacing"), made out of either "synthetic resin bonded paper" or fiberglass, and have some kind of copper pattern on one or both sides of the board.
Perhaps the most popular pattern is the "stripboard" -- which has wide strips of copper running one way all the way along one side of the board, but no copper on the other side. However, this type of board (and perfboards in general) will require soldering for the circuits to be able to function properly.
The other common type of prototype boards is the solder-less prototyping board also known as a breadboard.
Further reading
Open Circuits: stripboard
Commons Wikimedia: gallery of stripboard images
Wikipedia: stripboard
Wikipedia: perfboard
Wikipedia: Veroboard