PCI(Sub)Classes
The Listing:

Class SubClass Description
00 Unknown
00 Undefined
01 Undefined VGA
01 Storage
00 SCSI
01 IDE
02 Floppy
03 IPI
04 RAID
80 Other
02 Network
00 Ethernet
01 Token Ring
02 FDDI
03 ATM
80 Other
03 Display
00 VGA
01 SuperVGA
02 3D
80 Other
04 Multimedia
00 Video
01 Audio
80 Other
05 Memory
00 RAM
01 Flash
80 Other
06 Bridge
00 PCI-to-HOST
01 PCI-to-ISA
02 PCI-to-EISA
03 PCI-to-MCA
04 PCI-to-PCI
05 PCI-to-PCMCIA
06 PCI-to-NuBUS
07 PCI-to-Cardbus
08 PCI-to-RACEway
80 PCI-to-Other
07 Communication
00 Serial
01 Parallel
02 Multiport Serial
03 Hayes Compatible Modem
80 Other
08 System
00 PIC
01 DMA
02 Timer
03 RTC
80 Other
09 Input
00 Keyboard
01 Pen
02 Mouse
03 Scanner
04 Game Port
80 Other
0A Docking
00 Generic
80 Other
0B Processor
00 386
01 486
02 Pentium
03 PentiumPRO
10 DEC Alpha
20 PowerPC
40 CoProcessor
80 Other
0C Serial
00 FireWire
01 Access.Bus
02 SSA
03 USB
04 Fiber
05 SMBus Controller
80 Other
0D Wireless
0E Intelligent I/O
0F Satellite Communication
10 Encryptor/Decryptor
11 Data Aquisition & Signal Processing