Most current laptops have PCMCIA capability.
PCMCIA - Personal Computer Memory Card International Association aka PC cards. A slot usually on the side of of the laptop where you can insert different devices. Some of the devices are modems, ethernet (wired & wireless), memory, i/o controllers like USB, SCSI, firewire etc... etc...
http://www.webopedia.com/TERM/P/PCMCIA.html