Do you know the difference between a Megabyte and a Kilobyte? This deck has all of the metric prefixes, abbreviations and the multipliers that you are most likely to see on a daily basis. If you don't know what any of this means, prefixes are appended to the beginning of a unit like "metre" (meter) which is the base unit of length in the metric system and has an abbreviation "m". So a micro-metre would use the abbreviation "μm" and would be equal to 10^-6 metres.