Another on-line convention, used especially for very large or very small
numbers, is taken from C (which derived it from FORTRAN). This is a
form of `scientific notation' using `e' to replace `*10^'; for example,
one year is about 3e7 seconds long.

The tilde (~) is commonly used in a quantifying sense of
`approximately'; that is, `~50' means `about fifty'.

On USENET and in the {MUD} world, common C boolean, logical, and
relational operators such as `|', `&', `||', `&&', `!', `==', `!=', `>',
and `<', `>=', and `=<' are often combined with English. The Pascal
not-equals, `<>', is also recognized, and occasionally one sees `/=' for
not-equals (from Ada, Common Lisp, and Fortran 90). The use of prefix
`!' as a loose synonym for `not-' or `no-' is particularly common; thus,
`!clue' is read `no-clue' or `clueless'.

A related practice borrows syntax from preferred programming languages
to express ideas in a natural-language text. For example, one might
see the following:

I resently had occasion to field-test the Snafu
Systems 2300E adaptive gonkulator. The price was
right, and the racing stripe on the case looked kind
of neat, but its performance left something to be
desired.

#ifdef FLAME
Hasn't anyone told those idiots that you can't get
decent bogon suppression with AFJ filters at today's
net speeds?