How would you write "not equals" in shorthand or notation?

[liam_on_linux]

Quick question for the coders and those in related fields.

What notation do you first think of for "not equals" or "is not equal to"?

[1] <> (less than, greater than - BASIC style)
[2] != (exclamation mark, equals sign - C style)
[3] ≠ (crossed-out equals sign - algebraic style)
[4] .NE. (ancient FORTAN notation for elder programmers)
[5] ¬ (does anyone use the logical-NOT sign on the PC keyboard? (Except me in smilies?))
[6] A "NOT" gate (from a circuit diagram)
[7] Wikipedia suggests that /= is also a coding notation, but I've never seen it.
[8] Anything else?