M = Mint : book as new.
F = Fine : Book in excellent condition but not absolutely as new.
VG = Very Good : The book has imperfections, but is still in good condition.
G = Good: the book is clearly second hand and has faults.
P = Poor : the book can still be read, but is very shabby / damaged.
+ ' and ' - ' refer to above or below the Category.
pp = pages
8vo = the average sized book
4to = an 'oversized' book
ed = edition / editor
ltrs = letters
cvr = cover
fep = front endpaper
bk = book
rep = reprint(ed)
nd = no date ( publishing )
d/w = dustwrapper
US = United States
ant. = anthology
ex - lib = ex library book
imp = impression.
edpr = endpaper