Quad Inline (QUIL) is a square package for logics. Since it was often not possible to realize the number of connection contacts with the Dual Inline Package (DIL) in the 90s, the QUIL package was developed. It is similar in structure to the DIL package, but the connections
are designed in double rows. Development in the 1990s was already moving towards the chip carrier package, which is available in a wide variety of designs.