I have started collecting all diagrams/images on this site on this single page for a quick reference. I will be adding more as I find time.
Click on image for full size. Enjoy!
Industry Players & FIX Protocol
FIX Engines & Usage
Application Integration Options
Securities Trade Processing
Securities Trading Platform
Strike Price Code Table
Futrues Delivery Month Codes
Expiration Code Table
Unix Process State Diagram
Unix - Threaded Process Memory Space
More to come …