I need help with identifying these boards.

16A can't tell if that is gold or brass, if it is gold then connector ends, if it is brass then I'm not sure.
16B same as above
16C steel
16D IC chip
16E no grade
16F IC chip
16G connector end
16H not sure
16I not sure
16J remove the metal shield, gold finger card without bracket
16K gold fingered ram
16L gold fingered ram
16M gold fingered ram
16N gold fingered ram
16O backplane
16P high peripheral, remove the metal shield if you can but it's probably fine
16Q high telecom
16 high peripheral, remove the metal shield if you can although it's probably fine.

I keep meaning to say this, make sure you read through LostinLodos' post. In your case limiting the number of boards should allow you to take better photos so we can see more details of what's there and give a more accurate grade. Kudos to the great job organizing your boards in the photo though! Greatly appreciated.

16C) Check with a magnet. If it doesn't stick then you're looking at plated copper/brass, check with a file.

16H) Probably connector end but hard to say from the pic

16I) Looks like some sort of circuit board, better picture?

16P,R) Definitely remove metal if possible.

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Here to learn more so I can recycle more
My grades are my own opinion and not an official grade from Boardsort