Cisco 4000 Series Routers

• Cisco IOS Release 12.0
  Cross-Platform Release Notes

• Cisco 4000 Series - Cisco IOS Release 12.0 T

• Release Notes for Cisco IOS Release 12.0 W5

• Caveats
  Caveat documentation for Cisco IOS Releases 12.0 and 12.0 T (includes open and resolved severity 1 and 2 caveats and select severity 3 caveats for all platforms)