Alternatively referred to as a piggyback board and daughter card, a daughterboard is an expansion board that connects directly to the motherboard and gives added functionality (e.g. modem). Today, these boards are not found or used in desktop computers and have been replaced with ISA cards, PCI cards, and onboard. However, some laptops still use these boards.
Note: To disable a daughter board the user must physically remove it from the motherboard.
Note: Some may use the term daughterboard to describe an expansion card.