 stm = Short to Metric Tons
 mts = Matric to Short Tons
 mk = Miles to Kilometres
 km = Kilometres to Miles
 smk = Square Miles to Square Kilometres
 skm = Square Kilometres to Square Miles
 mf = Metres to Feet
 fm = Feet to Metres
 smf = Square Metres to Square Feet × 10
 sfm = Square Feet × 10 to Square Metres
 cmf = Cubic Metres to Cubic Feed × 10
 cfm = Cubic Feed × 10 to Cubic Metres

 gl = Gallons to Litres
 lg = Litres to Gallons
 lq = Litres to Quarts
 ql = Quarts to Litres
 kp = Kilograms to Pounds
 pk = Pounds to Kilograms
 og = Ounces to Grams × 10
 go = Grams × 10 to Ounces

 my = Metres to Yards
 ym = Yards to Metres
 smy = Square Metres to Square Yards
 sym = Square Yards to Square Metres
 cmy = Cubic Metres to Cubic Yards
 cym = Cubic Yards to Cubic Metres

 ic = Inches to Centimetres
 ci = Centimetres to Inches
 sic = Square Inches to Square Centimetres
 sci = Square Centimetres to Square Inches
 cic = Cubic Inches to Cubic Centimetres
 cci = Cubic Centimetres to Cubic Inches
