[This one might not make much sense to non-musicians, but I'm going with it because a couple of people celebrating birthdays today are musicians, including one guitarist. Happy birthday, John. And John.]
"I did write music for electric guitars, but I followed Mancini's advice amounting to 'your guitarist will know what to do', comparable to 'molto espress.' in classical music." -- Alex (scheutzow4cond), regarding musical notation for guitar parts including slides, bends, and other such articulation, on the ABC Users mailing list 2012-10-13
[I have not yet managed to find the original source in Mancini's own words.]