In on-line exchanges, hackers tend to use decimal forms or improper
fractions (`3.5' or `7/2') rather than `typewriter style' mixed
fractions (`3-1/2'). The major motive here is probably that the former
are more readable in a monospaced font, together with a desire to
avoid the risk that the latter might be read as `three minus
one-half'. The decimal form is definitely preferred for fractions with
a terminating decimal representation; there may be some cultural
influence here from the high status of scientific notation.
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 [126]MUD world, common C boolean, logical, and
relational operators such as |, &, ||, &&, !, ==, !=, >, <, >=, 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'.
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