As one discovers from the many varient opinions this topic generates significant misunderstanding. By placing the first occurence of a given symbol (abbreviation) in each article or presentation within parenthises you remove all doubt about what you mean.

For example: "First quarter earnings were up by $2 Million (MM), a significant improvement over the the $250 Thousand (M) loss in the final quarter of last year.

Then you may use the abbreviations throughout your article without concern for being misunderstood.

As one discovers from the many variant opinions this topic generates significant misunderstanding. By placing the first occurrence of a given symbol (abbreviation) in each article or presentation within parentheses you remove all doubt about what you mean.

For example: "First quarter earnings were up by $2 million (MM), a significant improvement over the the $250 thousand (M) loss in the final quarter of last year.

Then you may use the abbreviations throughout your article without concern for being misunderstood.