PCMCIA PC Card Slot
The Tecra M4 has one PCMCIA (PC Card) slot for one 5mm Type II card. It uses a Texas Instruments PCI7411ZHK Cardbus Controller.
Are you looking for a cool mouse to fit in your PCMCIA card slot? Check out: http://www.newtonperipherals.com/Mogo_Products.htm
I do not know anyone who has this mouse so we do not know how well it works. If you have one, please write about it here.