AA	Craters
AB	Underwater features
AF	Atmospheric features
AL	Albedo Features
AN	Administrative areas
AP	Airports
AR	Archipelagoes
AT	Atolls and Reefs
AV	Active volcanoes
BA	Basins
CA	Chain of craters
CB	Hollows
CH	Broken terrain
CM	Chasms
CN	Countries
CO	Hills
CP	Capes & headlands
CR	Corona
CS	Coastal sea feature
CT	Countries
CY	Canyons
DE	Deserts
DN	Dependencies
DO	Ridges
DP	Deeps and troughs
DS	Deserts
EQ	Earthquakes
ER	Active volcanoes
ES	Escarpments
FA	Bright spots
FE	Curved ridges
FL	Flow terrain
FO	Narrow depressions
FR	Pancake-like structures
GF	Gulfs
HR	Highlands
IC	Impact craters
IG	Island groups
IL	Towns & cities
IS	Islands
LA	Landslides
LB	Intersecting valleys
LC	Small plains
LE	Small dark spots on Europa
LF	Lunar features at or near Apollo landing sites
LG	Ringed features
LI	Elongated markings
LK	Lakes
LS	Landing sites
MA	Dark spots
ME	'Seas'
MN	Cliffs
MO	Mountains
MR	Mountain ranges
OA	Oases
OC	Oceans
PA	Small plains
PE	Irregular craters
PF	Geographical features
PL	Plains
PM	High plains
PN	Plains
PO	Poles
PR	Promontories
PT	Plateaux
PU	Plumes
PX	Peninsulars
RE	Regions
RI	Fissures
RT	Net-like pattern on Venus
RU	Scarps
RV	Rivers
SC	Irregular scarps
SE	Seas
SET	Regions
SI	Small plains
SM	Seamounts
ST	Straits
SU	Furrows
TA	Land masses
TC	Tectonic plates
TE	Tiled terrain
TH	Small mountains
UF	Undersea features
UN	Dunes
VA	Valleys
VO	Volcanoes
VS	Large plains
XX	No labelled features