I need to know what kind of wireless card will work in my Sony PCG 993L notebook. I need to make it wireless.

From what I can find (not much, Sony doesn't even have it listed anymore) it should have a standard PCMCIA slot on it, and in that case any PCMCIA wireless card will work as long as it has drivers for your OS. If that XP then all cards made within the last 5 years should work.

The other option is to get a USB wireless adapter.