abbreviation cheat sheet

Will someone please let me know where the post is that explains what all the abbreviations are that are used throughout these discussions. I'm new to this group and am feeling overwhelmed. I'd like to understand but I all I can figure out on my own is BMR =base metobolic rate? I visited the website Scooby's Home Workouts and I watched his video. Unfortunately, he assumes I know these abbreviations also. What post on this site explains the science and the bottom line to Eat More to Weigh Less (EMTWL)?
Thanks.
Debbie

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