1. #1?
RIMM
DIMM
SIMM

2. #2?
keyboard connector
modem connector
power supply connector

3. #3?
keyboard connector
modem connector
power supply connector

4. #4?
EISA
AGP
PCI

5. #5?
PCI
EISA
ISA

6. #6?
PCI
SIMM
ISA

7. #7?
RAM
BIOS
chipset

8. #8?
AGP
CPU socket
power supply connector

9. #9?
chipset
CPU
AGP

10. #10?
CMOS battery
keyboard connector
BIOS

11. #11?
IDE socket
floppy socket
power supply connector

12. #12?
power supply connector
IDE socket
floppy socket