driver loaded automatically

[ray]

I found the driver of my wireless network card is loaded right after the
system boots up. I checked the /etc/modules and not found that driver. I had
thought that driver is loaded automatically by discover, so I disabled the
/etc/rcS.d/S36discover, but the driver is still be loaded automatically
after booting up. That driver is not used by any other modules. Do any other
mechanisms exist  that cause drivers loaded automatically? Thanks.