2 math formatting edited Mar 10 '18 at 10:18 ctrl-alt-delor 7,82731749 I've worked in IT professionally since the mid-1980s. My current practice is to write whichever of e.g. KB or KiB that I mean at the time, with KB meaning 10^3$$10^3$$ and KiB meaning 2^10$$2^{10}$$. If I'm talking about the RAM in a machine I'll write e.g. "64MiB" and if I'm talking about the as-manufactured and as-marketed size of a disk drive I'll write "1TB." I am not, however, prepared to use words like "mebibyte" in conversation. Maybe one day I'll change my verbal abbreviations from e.g. "meg" to "meb" but I'm not there yet. I've worked in IT professionally since the mid-1980s. My current practice is to write whichever of e.g. KB or KiB that I mean at the time, with KB meaning 10^3 and KiB meaning 2^10. If I'm talking about the RAM in a machine I'll write e.g. "64MiB" and if I'm talking about the as-manufactured and as-marketed size of a disk drive I'll write "1TB." I am not, however, prepared to use words like "mebibyte" in conversation. Maybe one day I'll change my verbal abbreviations from e.g. "meg" to "meb" but I'm not there yet. I've worked in IT professionally since the mid-1980s. My current practice is to write whichever of e.g. KB or KiB that I mean at the time, with KB meaning $$10^3$$ and KiB meaning $$2^{10}$$. If I'm talking about the RAM in a machine I'll write e.g. "64MiB" and if I'm talking about the as-manufactured and as-marketed size of a disk drive I'll write "1TB." I am not, however, prepared to use words like "mebibyte" in conversation. Maybe one day I'll change my verbal abbreviations from e.g. "meg" to "meb" but I'm not there yet. 1 answered Mar 9 '18 at 22:47 WatcherOfAll 1092 I've worked in IT professionally since the mid-1980s. My current practice is to write whichever of e.g. KB or KiB that I mean at the time, with KB meaning 10^3 and KiB meaning 2^10. If I'm talking about the RAM in a machine I'll write e.g. "64MiB" and if I'm talking about the as-manufactured and as-marketed size of a disk drive I'll write "1TB." I am not, however, prepared to use words like "mebibyte" in conversation. Maybe one day I'll change my verbal abbreviations from e.g. "meg" to "meb" but I'm not there yet.