4 ms·

That would be the copyright date of the book, combined with medical licensing requirements that doctors stay up-to-date in their field.

• astrodust 9y ago
  Just imagine if software engineers had the same certification requirements as, say, pilots. Or, hell, plumbers.
  • ColanR 9y ago
    I want to say that would be fantastic, except that the software engineers might be pretty miserable. Also, aren't there such certs already?