Module vs Board

What is the difference between a module and a board?

bradwiggo: What is the difference between a module and a board?

A module is a unit of study. A board is a piece of wood.

Context helps immensely.

Oh, yeah? Well then what is the difference between a chip and a DIP? :-)

Well, one eats salsa with a chip, a DIP can be plugged into a breadboard. You can't eat a breadboard. Chips can be SMD or DIP.

A module is typically a small CCA (circuit card assembly) that can plug onto a larger CCA. Both can be considered boards.

Very helpful, it's obvious, I'm talking about arduinos.

I would say that they're pretty much the same thing, with a SLIGHT implication that a "board" is easier to use immediately or closer to a real product, while a "module" requires more effort. An Arduino Pro Mini is a module, an EMSL Peggy is definitely a board, and an Arduino Uno is somewhat in-between...