Dual in-line package

In electronics, a Dual In-line Package (DIP), sometimes called a DIL package, is an electronic device package with a rectangular housing and a row of electrical connecting pins along each of two opposite sides, usually the longer sides of the rectangle.

Note: DIPs may be used for integrated circuits, like microprocessors, or for discrete components such as resistors or toggle switches. A typical DIP may be a microcircuit package with two rows of seven vertical leads that is specially designed for mounting on a printed circuit board.

Source: Federal Standard 1037C