This is a short list of abbreviations and colloquialisms commonly used in email conversations. Some of these are quite universal to the Internet, some are more specific to the QFS and related groups.
1D, 2D, 3D, 4D, 5D, 6D, 7D - The D refers to density. See Density. BBM - Big Blue Marble. Means Earth. C's - Cassiopaeans CS - Colloidal Silver. FWIW - For What It's Worth. G - Often refers to Gurdjieff. IMHO - In My Humble Opinion ISOTM - In Search of the Miraculous. IMO - In My Opinion M - Often refers to Mouravieff, Boris. MCS - Matrix Control System. O - Often refers to Ouspensky. OSIT - Or So I Think. Means that the preceding is a working hypothesis or a personal view, subject to change, not a final statement of authority. OTAH - On The Other Hand. P's - Sometimes refers to Pleiadians. PTB - Powers That Be. Refers to government. SoT, SoTT - Signs of the Times - QFS daily news review. STO - Service To Others STS - Service To Self