I have occasional references that mention things like "Adjust the Kd pot until the voltage is <= 2.0 v" or "Turn the screw until the clearance is => .005 inch."
<= means less than or equal to.
=> means greater than or equal to.
I looked the the installed Character Sets PDF file and could not find these symbols. Is there an ASCII or ANSI code or a special font that has these items as a single symbol?
If you're using a FM8 or greater than you should use the Unicode values for these symbols:
<= is /u2264
>= is /u2265
However, the font that you are using must contain the glyphs in these code points.
With the ANSI Symbol and Dingbats sets, these symbols were coded at:
0163 (\xa3) (ctrl-q #) less than or equal to
0179 (\xb3) (ctrl-q 3) greater than or equal to
> ... I was able to insert those symbols with the ANSI codes ...
If by that you mean in-line text with the Symbol font applied and the Ctrl-whatever hand-typed, you might consider doing these special characters as Variables. See thread: