All text in roman type; italic reserved sparingly for emphasis and math. Special math functions are in roman; e.g., sin, log.
Chemistry: element name in lower case, symbol in caps: calcium, Ca.
Units, all in roman. There is a space between unit and number before it: 43 s, 13.9 kW, 0.12 EJ but $12.72. Most units are abbreviated with capital roman letters, but ancient exceptions: : s, m, g.
Single capital letters denote increasing factors of thousand, while lower case decreasing factors of a thousand; except k (kilo) & μ (mico).]
| factors of ten | 3 | 6 | 9 | 12 | 15 | 18 |
| increasing | k(kilo) | M(mega) | G(giga) | T(tera) | P(peta) | E(exa} |
| decreasing | m(milli) | μ(mc) | n(nano) | p(pico) | f(femto) | a(atto} |
Above is available on a 3x5 card suitable for carrying.
Below is table going to the maximum/minimum SI units.
| factors of ten | 3 | 6 | 9 | 12 | 15 | 18 | 21 | 24 |
| increasing | k(kilo) | M(mega) | G(giga) | T(tera) | P(peta) | E(exa} | Z(zetta) | Y(yotta} |
| decreasing | m(milli) | μ(mc) | n(nano) | p(pico) | f(femto) | a(atto} | z(zepto} | y(yocto} |