MAN B&W Engine Type Designation

We always hear this statement or tell others that:
"Oh i have worked on 10S80ME engine on my last ship" or "my last ship was propelled by SULZER RTA 68-7-flex engine"
Now do we really understand what the above statement means or what are we talking about?
We have worked on different types of MAN and Sulzer engines in the past and will continue to do so. We have come across so many engine designations and types in our past, but how many of us know exactly what these designations mean? 

MAN B&W Engine Type Designation

10S90ME-C9-GI-EGRBP

10     - Number of cylinders
S       - Stroke/bore ratio {G   'Green' ultra long stroke
                                         S    Super long stroke
                                         L    Long stroke
                                         K   Short stroke}

90     - Diameter of piston in cm

M     - Engine programme series

E      - Engine concept{ME-C Compact engine
                                   ME-B Exhaust valve controlled by camshaft}

C9    - Mark number

GI    - Fuel injection concept{blank    Fuel oil only
                                                GI        Gas injection methane
                                                GIE      Gas injection ethane
                                                LGIM  Liquid gas injection methanol
                                                LGIP    Liquid gas injection LPG}

EGRBP-Tier III technology {blank Tier II only
                                       EGRBP  EGR with bypass matching
                                       EGRTC  EGR with TC cut-out matching                                           HPSCR  High-pressure SCR
                                       LPSCR   Low-pressure SCR}