Computers with ISA and PCI slots by Ram PC Systems
Also in some cases the same PCI bus that drives the PCI slot(s) may be shared with onboard perhipherals, especially on older systems or systems that have onboard support for legacy interfaces such as firewire.
Legacy PCI sound cards on Modern Motherboards - Windows XP/2000 ...
A legacy PCI slot makes for the rest of the expansion area. Storage connectivity includes four SATA 3 Gb/s ports. Display outputs include DVI and D-Sub.
PC/104 - Wikipedia
4 legacy PCI slots reserve the usage ability of legacy PCI devices. And with proven Asus stability and reliability, you can count on the P10S-V/4L in various applications.