“Dual in-line package” which is the style of plastic packaging with two rows of pins intended for through hole PCB usage. See: https://en.m.wikipedia.org/wiki/

“Dual in-line package” which is the style of plastic packaging with two rows of pins intended for through hole PCB usage. See: https://en.m.wikipedia.org/wiki/Dual_in-line_package https://en.m.wikipedia.org/wiki/Dual_in-line_package