Here's some commonly used abbreviations used in e-mail. Some are PorscheList-specific:

BTDT - Been There, Done That
BTW - By The Way
DIY - Do It Yourself
FWIW - For What It's Worth
HTH - Hope This Helps
IMHO - In My Humble Opinion
LOL - Laughing Out Loud
MY - Model Year
OB - Old Bugger, an older 928, model yeat 1979/1980
OBC - Old Bugger's Club, see above
OTOH - On The Other Hand
PO - Previous Owner
PSD - Positiv Sperr Differential. A microcomputer controlled locking differential found on later 928's
RMB - Rear Muffler Bypass
ROFL - Rolling On the Floor Laughing
TIA - Thanks In Advance
YMMV - Your Mileage May Vary (your situation might be somewhat different)

For a more complete list, try

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