"c" = cent or local variant (except for things like Ghanaian cedis),
"p" = penny, pfennig, etc.,
"d" = old English pence
aF/+ = about fine or better, & so forth for grading
gF = fine plus (if I feel continental)
scs = scratches
ens/bs = edge nicks/bruises
cor = corrosion
sp = spot
cl = cleaned
sl = slight
xx cr = very crude
NM/ND = no mint/no date
dm/mm = date/mint missing
oc = off center
R/L= right/left
std = seated
stg = standing
adv = advancing
w/ = with
c/s = counterstamp
o/s = overstruck
o/p = overprint
ham = holed as made
AE20 = 20 millimeter bronze item
AR = silver
AV = gold
Al = aluminum
Bs = brass
Albz = aluminum bronze
CN = copper-nickel
bil = billon
ZnplFe = zinc plated iron
sh = staple holes (paper) or sand holes (cast coins)
(R), etc. = language (eg Russian)
avg = average

K-nl = unlisted in Krause-Mishler SCWC
P = Pick
S = Schjöth (Chinese cash) or Seaby (English, etc.)
H = Hartill (Chinese cash)
FD = Fisher's Ding (Chinese Cash)
MI/MA/MN = Mitchiner's Oriental Coins vols. I/II/III
SG/SGI/SR/SB = Sear's Greek,
Greek Imperial, Roman, Byzantine
-many other specialized references will be quoted occasionally

(pretty annoying not to be alphabetized, eh?)