There seems to be a small glitch in m-units.tex. The unit \Bit typesets "Bit". This is wrong, as bits are always in lowercase first letter: a single bit: bit a byte: B It is also possible to use b (for bit) and Byte (for B). However, bits are always small and Bytes large. The best practice seems to be to spell bits out (bit) and use abbreviation for Bytes (B). This minimizes confusion. I fixed this problem in my ConTeXt installation by tweaking rows 664 and 666. For more discussion, see: http://en.wikipedia.org/wiki/Byte It might be worth it to implement the octet (o), as well. It is a good unit (more precise and descriptive than byte) but the abbreviation is horrible. --- Another related thing is whether ConTeXt should implement IEC 60027-2 binary prefices (Ki, Mi, Gi, Ti). More info on this: http://www.iec.ch/zone/si/si_bytes.htm --- Well, then to a more practical thing... This is a very trivial question, but still. When writing a number and the unit, it would be nice to have automatic formatting. What I mean is that when I have a million two hundred thousand kilograms, I would like it to be typeset: 1(small space)200(small space)000(small space)kg Everything on a single row despite where it is. Now I write: 1\,200\,000\,\Kilo\Gram It would be more legible, if I could just write: \unit{1200000}{\Kilo\Gram} Taking care of all the fancy small spaces should be computer's problem. not mine... (Or does this mechanism already exist?) - Ville