Why might color-coded files be more efficient than alphabetic filing system

Because color coding is easier to remember.

Example:

Purple matches your Math book

Red matches your English book

and Green matches your Science book

You've forgotten what color is which, so you match the colors up with the notebooks.

the ecg findings of an acute anterior myocardial infarction wall include: st segment elevation in the anterior leads (v3 and v4) at the j point and sometimes in the septal or lateral leads, depending on the extent of the mi. this st segment elevation is concave downward and frequently overwhelms the t wave.

explanation:

there are men and women, some choose to be both or change their gender. often times those people go by "other". those who change their gender are known as "transgender"