lbs/oz and gm/kgm are weights. Let's put that aside.
oz/cups/pints/quarts/gallons are the somewhat stupid imperial measures for liquid, especially the use of oz for both solids and liquids. ml/litres are metric measures for liquids.
Let's stick to liquids - Someone has an electronic digital scale that you pour liquid into the bowl and the digital scale reads out in ml/litres?
That would be amazing. I am suspecting however that the "bowl" on the scale has graduations on it and the digital part is not used for liquid.
I am not being a smart aleck, I am just trying to understand this amazing technology.