METRIC
IMPERIAL
MARINE
SURVEYING
ASTRONOMICAL
ARCHAIC
MEDIEVAL DANISH
MEDIEVAL DUTCH
RUSSIAN (OBSOLETE)
ANCIENT GREEK (OBSOLETE)
TATAR (OBSOLETE)
ROMAN
FINNISH (OBSOLETE)
MEDIEVAL FRENCH
MEDIEVAL GERMAN
MEDIEVAL NORWEGIAN
MEDIEVAL ROMANIAN
MEDIEVAL SCOTTISH
MEDIEVAL SPANISH (CASTILIAN)
MEDIEVAL SWEDISH
UNUSUAL UNITS
TYPOGRAPHIC
FICTIONAL
ETHIOPIAN (HISTORICAL)
ENGLISH (HISTORICAL)
ERITREAN
GUINEAN (HISTORICAL)
LIBYAN (HISTORICAL)
MOROCCAN (HISTORICAL
ARABIC (HISTORICAL)
CAMBODIAN (HISTORICAL)
INDONESIAN (HISTORICAL)
JAPANESE (HISTORICAL)
PERSIAN (HISTORICAL)
SRI LANKAN (HISTORICAL)
NEPALESE (HISTORICAL)
VIETNAMESE (EARLY 20TH CENTURY)
THAI HISTORICAL
TAMIL (HISTORICAL)
PORTUGUESE (HISTORICAL)
HUNGARIAN (HISTORICAL)
FRENCH (HISTORICAL)
CHINESE LENGTHS USED IN 1915
CHINESE LENGTHS USED 1930 ONWARDS
MONGOLIAN (HISTORICAL)