This is kind of a dubious question, but is the product notation $\prod$ often used in noncommutative rings?
For example, if $M_i$ are matrices, I guess the common definition of $\prod$ is $$\prod_i M_i=M_1\,M_2\dots$$
but is it also sometimes used as $$\prod_i M_i=\dots M_2\,M_1\text{ ?}$$
If not, is there a common notation for the latter product?
