This OID reports the logical slot number of a PC Card slot, which also serves as the index into the PC Card data table, with typical systems supporting either two or four such slots. An admin monitoring a laptop-style or docking-capable system should be aware that the supported index range can change dynamically when the system is docked or undocked, so the set of valid slot indexes is not always fixed. For example, undocking a system that normally reports slot indexes 1 through 4 might reduce the reported range down to just the built-in slots once the docking station's PC Card slots are no longer present.